Ferrite magnetic ring sintering bearing device and blank arranging method

Abstract

The invention discloses a ferrite magnet ring sintering bearing device and a blank arranging method, and belongs to the technical field of ferrite magnet rings, the ferrite magnet ring sintering bearing device comprises a concave bearing plate, a flat type ferrite magnet ring is arranged in the concave bearing plate, and the concave bearing plate comprises a bearing bottom plate, a first protruding side plate and a second protruding side plate. According to the invention, the problems of easy cracking, large dispersion and poor uniformity due to adoption of stacking sintering in the prior art are solved. According to the invention, tiled sintering is adopted, the circle centers of the ferrite magnetic rings are axially parallel to the concave setter plate, a plurality of ferrite magnetic rings are connected in the axial direction, the concave setter plate is fully paved in the same way in the radial direction, in the sintering process, the external force is small, and heat radiation passes through the centers of the ferrite magnetic rings, so that the whole body is uniformly heated; and rubber discharging and oxygen partial pressure are approximately consistent, external force division is not needed, and due to the influence of atmosphere unification and overall heating uniformity, the performance is improved, and cracked waste products are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ferrite magnetic rings, in particular to a ferrite magnetic ring sintering and firing device and a blank arranging method. Background Art

[0002] Ferrite magnetic rings are parts that can suppress electromagnetic interference, mainly including nickel-zinc ferrite magnetic rings and manganese-zinc ferrite magnetic rings. The higher the magnetic permeability of ferrite, the greater the low-frequency impedance and the smaller the high-frequency impedance. Existing high-conductivity material magnetic ring products generally adopt stacking sintering, which will have a negative effect on the bottom magnetic ring. The specific impacts are as follows:

[0003] 1) The upper magnetic ring will exert pressure on the bottom magnetic ring, causing the bottom magnetic ring to deform, crack easily, and deteriorate performance; 2) In stacked sintering, the heat is uneven during the sintering process, which is easy to cause cracking and deterioration of performance; 3) In stacked sintering, the internal gas is not circulated, which makes it difficult to remove the binder and the oxygen partial pressure is unbalanced, resulting in abnormal grain growth of the internal magnetic ring, deterioration of mechanical strength, easy cracking, and deterioration of performance; 4) In the stacked sintering process, the contact surfaces of the upper and lower magnetic rings will grow together at high temperatures, resulting in the need for external mechanical force to split the magnetic rings, which are easy to crack under the influence of external forces; 5) In stacked sintering, the center position of the top layer has good thermal insulation effect, strong thermal radiation effect, and high overall magnetic permeability, while the bottom layer is affected by various reasons and has low magnetic permeability, resulting in large dispersion and poor uniformity of the sintered products. Summary of the invention

[0004] The object of the present invention is to provide a ferrite ring sintering and arranging device and a blank arranging method, which adopts flat sintering, and the center axis of the ferrite ring is parallel to the concave supporting plate. In the axial direction, multiple ferrite rings are connected, and in the radial direction, the concave supporting plate is covered in the same way. During the sintering process, the external force is small, and the heat radiation passes through the center of the ferrite ring to make the whole heated evenly, and the debinding and oxygen partial pressure are close to consistent, and no external force is required to separate. Due to the influence of the unified atmosphere and the uniform overall heating, the performance is improved, the cracking waste is reduced, and the problems raised in the above-mentioned background technology are solved.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ferrite magnetic ring sintering and firing device comprises a concave firing plate, in which a flat ferrite magnetic ring is arranged, wherein the concave firing plate comprises a firing bottom plate, a first raised side plate and a second raised side plate, and the first raised side plate and the second raised side plate are respectively arranged on both sides of the firing bottom plate, and the first raised side plate and the second raised side plate are arranged in parallel.

[0007] Preferably, the first raised side plate and the second raised side plate are used to fix the flat ferrite magnetic ring.

[0008] Preferably, the first raised side plate and the second raised side plate are stacked up and down in the same sintering grid to accommodate double the ferrite magnetic rings.

[0009] According to another aspect of the present invention, a method for sintering and arranging ferrite magnetic rings is provided, which is implemented based on the sintering and sintering device for ferrite magnetic rings as described above, and comprises the following steps:

[0010] S1: Using a flat sintering method, the ferrite magnetic ring is flatly placed on the inner side of the concave support plate, and the flat ferrite magnetic ring is fixed by a first convex side plate and a second convex side plate;

[0011] S2: Make the center of the ferrite magnetic ring axially parallel to the concave support plate. In the axial direction, multiple ferrite magnetic rings are connected. In the radial direction, the concave support plate is covered with the same arrangement as in the axial direction.

[0012] Preferably, in S1, two layers of ferrite magnetic rings are placed in the concave support plate, wherein the ferrite magnetic rings of the upper layer are placed in the gaps between the ferrite magnetic rings of the lower layer.

[0013] Preferably, in S2, the centers of the ferrite magnetic rings are connected in the axial direction.

[0014] Preferably, in S2, outer surfaces of the ferrite magnetic rings are in contact with each other in the radial direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts flat sintering, and the center axis of the ferrite ring is parallel to the concave support plate. In the axial direction, multiple ferrite rings are connected, and in the radial direction, the concave support plate is covered in the same way. During the sintering process, the external force is small. Since the centers of the ferrite rings are connected, heat radiation can pass through the centers of the ferrite rings to make the whole heated evenly, and the debinding and oxygen partial pressure are close to the same, so that the ferrite rings are not easy to deform or crack. In addition, during the sintering process, due to the shrinkage of the ferrite rings, the subsequent ferrite rings will automatically separate without the need for external force to separate, thereby reducing the risk of cracking. Due to the unified atmosphere and the overall uniform heating, not only the performance is improved, but also the cracked waste is reduced, and the overall qualified rate is improved by more than 25%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a ferrite magnetic ring sintering and firing device of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of placing the lower ferrite ring in the concave support plate of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the ferrite magnetic ring of the present invention laid flat;

[0020] Figure 4 It is a schematic diagram of the structure of the upper and lower stacking of the sintering devices in the same sintering grid of the present invention;

[0021] Figure 5 It is a schematic diagram of the distribution range of magnetic permeability of the conventional stack sintering and the special device sintering of the present invention;

[0022] Figure 6 It is a schematic diagram of the cumulative statistics of the traditional stack sintering and the special device sintering of the present invention.

[0023] In the figure: 1, concave support plate; 11, support bottom plate; 12, first raised side plate; 13, second raised side plate; 2, ferrite magnetic ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to solve the problems of existing high-conductivity material magnetic ring products that are prone to cracking, large dispersion, and poor uniformity by stacking and sintering, please refer to Figure 1-Figure 6 , this embodiment provides the following technical solutions:

[0026] Embodiment 1

[0027] A ferrite magnetic ring sintering and firing device comprises a concave firing plate 1.

[0028] A flat ferrite ring 2 is arranged inside the concave support plate 1.

[0029] Among them, the concave support plate 1 includes a support bottom plate 11, a first raised side plate 12 and a second raised side plate 13. The first raised side plate 12 and the second raised side plate 13 are respectively arranged on both sides of the support bottom plate 11, and the first raised side plate 12 and the second raised side plate 13 are arranged in parallel.

[0030] In this embodiment, the first protruding side plate 12 and the second protruding side plate 13 are used to fix the flat ferrite ring 2 .

[0031] It should be noted that the concave supporting plate 1 used is different from the traditional flat supporting plate. The first raised side plate 12 and the second raised side plate 13 arranged on the left and right sides of the concave supporting plate 1 can cooperate with the flat sintering method in this embodiment, which not only plays the role of fixing the ferrite magnetic ring 2, but also increases the loading capacity of the concave supporting plate 1.

[0032] Specifically, through actual testing, the device can place two layers of products without deformation or cracking of the concave support plate 1, so that the sintered ferrite magnetic ring 2 has excellent performance.

[0033] Embodiment 2

[0034] In this embodiment, the first protruding side plate 12 and the second protruding side plate 13 are stacked up and down in the same sintering grid to accommodate double the ferrite magnetic rings 2 .

[0035] It should be noted that two sets of this device can be stacked up and down in the same sintering grid, and the overall loading capacity can reach 84% of stacked sintering. The loading capacity is not much different from that of stacked sintering, and there are no obstacles on the front and back sides of the device, which facilitates the uniformity of atmosphere and sintering temperature. Compared with traditional stacked sintering, the advantages are extremely obvious.

[0036] Embodiment 3

[0037] In order to better demonstrate the ferrite magnetic ring sintering and blanking process, this embodiment now provides a ferrite magnetic ring sintering and blanking method, which is implemented based on the ferrite magnetic ring sintering and firing device as described above, and includes the following steps:

[0038] S1: Using a flat sintering method, the ferrite ring 2 is flatly placed on the inner side of the concave support plate 1, and the flat ferrite ring 2 is fixed by the first raised side plate 12 and the second raised side plate 13;

[0039] S2: Make the center of the ferrite ring 2 axially parallel to the concave support plate 1. In the axial direction, multiple ferrite rings 2 are connected. In the radial direction, the concave support plate 1 is covered with the same arrangement as in the axial direction.

[0040] In this embodiment, two layers of ferrite rings 2 are placed in the concave support plate 1, wherein the upper layer of ferrite rings 2 is placed in the gap between the lower layer of ferrite rings 2.

[0041] In this embodiment, the centers of the ferrite magnetic rings 2 are connected in the axial direction, and the outer surfaces of the ferrite magnetic rings 2 are in contact with each other in the radial direction.

[0042] It should be noted that, in the present embodiment, unlike stacked sintering, the present embodiment adopts flat sintering, in which the center axis of the ferrite ring 2 is parallel to the concave supporting plate 1, and in the axial direction, multiple ferrite rings 2 are connected, and in the radial direction, the concave supporting plate 1 is covered in the same way. This sintering method is less affected by external force during the sintering process. Since the centers of the ferrite rings 2 are connected, heat radiation can pass through the centers of the ferrite rings 2 to make the overall heating uniform, and the debinding and oxygen partial pressures are close to the same, so that the ferrite rings 2 are not easy to deform or crack. Moreover, during the sintering process, due to the shrinkage of the ferrite rings 2, the subsequent ferrite rings 2 will automatically separate, without the need for external force to separate, thereby reducing the risk of cracking. After inspection, the blank arrangement method of the present embodiment is compared with the traditional sintering blank arrangement method. The probability of cracking of the ferrite ring 2 has been greatly reduced, and under the condition that there is no problem with the batch production of the ferrite ring 2, no cracking can be achieved.

[0043] It should be noted that, after actual testing, the flat-laying blank arrangement method can achieve 84% of the stacked blank arrangement method in terms of loading capacity, and the magnetic permeability of qualified products is between 10500 and 13000, the traditional stacked sintering qualification rate is about 65%, and the qualification rate in the blank arrangement method of this embodiment is about 90%. Because the blank arrangement method of this embodiment has the influence of unified atmosphere and uniform overall heating, not only the performance is improved, but also the cracking waste is reduced, so the qualification rate is increased by about 25%. Therefore, compared with the traditional stacked sintering blank arrangement method, although the loading capacity is reduced by 16%, the qualification rate is increased by 25%. After inspection, the output of final qualified products in this embodiment is increased by about 10%, and this embodiment saves 16% of the cost, which greatly improves the company's benefits.

[0044] It should be noted that, unlike the traditional sintering stacking method, this embodiment adopts a special sintering device - a concave supporting plate 1 and a special sintering stacking method - flat sintering. The combination of the two has a loading capacity close to that of the stacking method, and has greatly improved the identity of the sintering atmosphere and the temperature uniformity. The loading capacity of the special sintering stacking method alone is only 66% of that of the stacking sintering. When a special sintering device is used, the loading capacity can reach 84% of the stacking sintering loading capacity, which is a significant improvement.

[0045] It should be noted that the ferrite magnetic ring 2 of this embodiment is flatly sintered and has two layers in the special device. Due to the force on the side of the magnetic ring, it is more likely to crack and deform. According to actual tests, the average cracking probability of the traditional blank arrangement method is about 5%. Under this embodiment, the probability of cracking and deformation is also improved, and the cracking probability is about 3%.

[0046] It should be noted that the deformation and cracking of the ferrite magnetic ring 2 caused by sintering are reduced, and due to the balance of oxygen partial pressure, the performance of the ferrite magnetic ring 2 is improved. After calculation, the loading capacity under the sintering support device can reach 84% of the stacked sintering in the same space, but the qualified rate is increased by more than 25%. Therefore, the output of qualified products is slightly improved compared with the two, and the sintering mode saves 16% of the cost. Among them, the ferrite magnetic ring sintering arrangement method provided in this embodiment is used to lay the ferrite magnetic ring 2 flat in the concave support plate 1, and the ferrite magnetic ring is sintered;

[0047] Among them, the sintering conditions of ferrite magnetic rings are shown in Table 1:

[0048] Table 1: Sintering conditions of ferrite rings

[0049]

[0050]

[0051] It should be noted that the special sintering device ratio and the traditional stack sintering ratio are the percentages of magnetic rings within this magnetic permeability range in the magnetic rings sintered this time.

[0052] Among them, the usage of the concave setter plate 1 is shown in Table 2:

[0053] Table 2: Usage of concave setter 1

[0054]

[0055]

[0056] It should be noted that, see Figure 5-Figure 6 , T is special device sintering (flat sintering), and D is traditional stacking sintering.

[0057] Therefore, the uniformity is reflected in the optimal magnetic permeability range of 10500-12000. The amount of magnetic rings in this range under the sintering support device accounts for 84% of the total, while the amount of magnetic rings in this range of stacked sintering only accounts for 36% of the total. Moreover, the dispersion of the magnetic ring performance under the sintering support device is much smaller than that of the magnetic ring performance of stacked sintering, and the uniformity is greatly improved.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ferrite magnetic ring sintering and firing device, comprising a concave firing plate (1), characterized in that: A flat-laying ferrite magnetic ring (2) is arranged inside the concave support plate (1), wherein the concave support plate (1) comprises a support bottom plate (11), a first raised side plate (12) and a second raised side plate (13), and the first raised side plate (12) and the second raised side plate (13) are respectively arranged on both sides of the support bottom plate (11), and the first raised side plate (12) and the second raised side plate (13) are arranged in parallel.

2. The ferrite magnetic ring sintering and firing device according to claim 1, characterized in that: The first raised side plate (12) and the second raised side plate (13) are used to fix the flat ferrite magnetic ring (2).

3. The ferrite magnetic ring sintering and firing device according to claim 2, characterized in that: The first raised side plate (12) and the second raised side plate (13) are stacked up and down in the same sintering grid for accommodating double the ferrite magnetic rings (2).

4. A method for sintering and arranging ferrite magnetic rings, which is implemented based on the sintering and firing device for ferrite magnetic rings as claimed in claim 3, characterized in that: The steps include: S1: using a flat-lay sintering method, placing the ferrite magnetic ring (2) flatly on the inner side of the concave support plate (1), and using a first convex side plate (12) and a second convex side plate (13) to fix the flat-lay ferrite magnetic ring (2); S2: The center of the ferrite magnetic ring (2) is axially parallel to the concave support plate (1). In the axial direction, a plurality of the ferrite magnetic rings (2) are connected. In the radial direction, the concave support plate (1) is covered with the same arrangement as in the axial direction.

5. The ferrite magnetic ring sintering and arranging method according to claim 4, characterized in that: In the above S1, two layers of ferrite magnetic rings (2) are placed in the concave support plate (1), wherein the ferrite magnetic rings (2) of the upper layer are placed in the gap between the ferrite magnetic rings (2) of the lower layer.

6. The method for sintering and arranging ferrite magnetic rings according to claim 5, characterized in that: In the S2, the centers of the ferrite magnetic rings (2) are connected in the axial direction.

7. The method for sintering and arranging ferrite magnetic rings according to claim 6, characterized in that: In the above-mentioned S2, the outer surfaces of the ferrite magnetic rings (2) are in contact with each other in the radial direction.

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