CN215867068U - Be applied to annular magazine of magnetic material powder system appearance of presintering - Google Patents
Be applied to annular magazine of magnetic material powder system appearance of presintering Download PDFInfo
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- CN215867068U CN215867068U CN202121742170.9U CN202121742170U CN215867068U CN 215867068 U CN215867068 U CN 215867068U CN 202121742170 U CN202121742170 U CN 202121742170U CN 215867068 U CN215867068 U CN 215867068U
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Abstract
The utility model discloses an annular material box applied to sample preparation of magnetic material pre-sintering powder, and relates to the technical field of ferrite powder production and manufacturing. The annular material box comprises a material box body and a material box cover, the material box cover can be completely embedded in an annular groove of the material box body in a clamping mode, the annular groove is used for containing materials, the bottom of the material box cover is in surface contact with the materials, and a specific containing space is arranged to prepare a pre-sintering material powder sample with the filling density meeting the relevant set requirements.
Description
Technical Field
The utility model relates to the technical field of ferrite powder production and manufacturing, in particular to an annular material box applied to magnetic material pre-sintering powder sample preparation.
Background
The magnetic material is used as an important basic functional material in the field of national economy and electronics, and the soft magnetic ferrite is an important component of the magnetic material, so that the magnetic material has the advantages of wide application range, large using amount and high growth speed. The magnetic material can cover a large number of electronic and electric products, and is one of basic materials in the material industry. The soft magnetic ferrite magnetic core is made of powdery soft magnetic ferrite particles through the working procedures of molding, sintering, post-processing and the like, the materials undergo solid-phase reaction in the sintering process and can bring certain shrinkage, and sintering cracking and deformation can be caused if the shrinkage ratio is too large. In order to better solve the problem, the material is generally pre-sintered in the preparation process, the pre-sintering temperature is generally lower than the sintering temperature, the raw material can be subjected to preliminary solid-phase reaction under the condition, the reaction degree is low, large-degree shrinkage is avoided, the shrinkage proportion in the subsequent sintering process can be reduced through pre-sintering, and the problems of cracking and deformation of the material and the like are reduced. However, the pre-sintered solid-phase reaction degree also needs to be strictly controlled, the reaction activity of subsequent sintering is poor when the reaction degree is exceeded, the performance of the final ferrite material cannot meet the requirement, and the effect of reducing the shrinkage ratio cannot be well realized when the reaction degree is low. In order to monitor the degree of solid phase reaction in the pre-sintering process and guide the setting and adjustment of the pre-sintering process parameters, the industry generally selects the degree of magnetization as the monitoring parameter.
The existing ferrite presintering material magnetization degree is mostly measured by adopting powder cups, the presintering materials are respectively filled in the cups, redundant powder is scraped after the presintering materials are filled, winding coils are wound on the outer sides of the powder cups, the windings are connected to an LCR tester to measure inductance, and the magnetization degree is calculated through the ratio of the inductance to the inductance of an empty cup. The measured magnetization data of different manufacturers has no comparability, because the sizes of the powder cups and the winding structures are different, the detection result has larger difference and has no reference comparability, and meanwhile, the parameter is not directly related to the final performance parameter magnetic permeability of the ferrite magnetic core, and the sintering performance of a final product cannot be indirectly controlled through the judgment result of the pre-sintering degree. In the method, the volume of the powder filled into the container is fixed, but different powders have different filling effects, namely different filling densities, so that the same volume and different weights can be caused, further, the test results are different, the analysis and judgment are influenced, and the standardization and specialization cannot be realized.
CN209356659U discloses a powder magnetization testing device, which comprises a coil tank and a powder cup for filling powder for testing powder magnetization, wherein the powder cup is sleeved in an inner cavity of the coil tank in a matching manner, and an enameled coil is correspondingly wound on the wall surface of the outer periphery of the coil tank body; the enameled wire of the enameled coil is a high-temperature-resistant enameled wire, and the number of winding turns of the enameled wire is controlled to be more than or equal to 100; and one end of the enameled coil on the outer wall surface of the coil tank is connected with two-pole testing ends, and the two-pole testing ends are made of brass sheet materials. The powder magnetization degree testing device also adopts a powder cup to prepare samples: filling magnetic material powder to be tested for the degree of magnetization into a powder cup, preventing vibration and keeping the powder loose; the surface of the magnetic material powder placed in the powder cup is horizontally scraped, so that the instability of powder density brought by different sample preparation processes cannot be guaranteed, and the instability of the result is finally caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the sample preparation of the existing ferrite pre-sintering material powder magnetization test does not have the filling density stability, the sample preparation difference is large, the magnetization measurement result is unstable, and the defect of no transverse comparability are overcome.
The above purpose of the utility model is realized by the following technical scheme:
the annular material box comprises a material box body and a material box cover, wherein the material box cover can be completely embedded in an annular groove of the material box body in a clamping mode, the annular groove is used for containing materials, and the bottom of the material box cover is in surface contact with the materials.
In the existing method for measuring the degree of magnetization of the solid-phase reaction degree in the pre-sintering process, the preparation difference of a sample is large, only the sample is filled and then redundant components are scraped, the filling effects of different powders are different, namely the filling densities of the powders are different, so that the weights of the powders of the pre-sintering material which may have the same volume are different, and further the test results are different, and the analysis and judgment are influenced.
In order to solve the problem of poor sample preparation stability and repeatability of powder samples in the prior art, the utility model provides the annular material box applied to the sample preparation of the magnetic material pre-sintered powder, the annular groove of the material box body and the material box cover are clamped and embedded to form a certain accommodating volume, a sample with stable filling density can be prepared by compacting through filling powder with certain mass, and a soft magnetic ferrite pre-sintered powder annular pre-sintered material sample with the filling density required by the optimal magnetization detection effect can be obtained when the soft magnetic ferrite pre-sintered material is filled.
Because the powder has certain compressibility, the bottom of the material box cover is in contact with and compacted on the upper surface of the material through the clamping and embedding of the material box and the material box cover, the powder can be uniformly filled in a fixed volume formed by the material box cover and the material box, the weight is fixed, the filling density of the prepared annular pre-sintered material sample is determined, and the prepared annular pre-sintered material sample is stable and repeatable, so that the stability and reliability of a subsequent detection result are ensured.
Preferably, the distance between the bottom of the annular groove and the bottom of the material box cover is H, H is less than or equal to 50mm, and the ratio Do/Di of the outer diameter and the inner diameter of the annular groove is less than or equal to 1.4.
Because the whole sample piece (including the annular material box) needs to be placed in the closed magnetic circuit inductance tester to measure the related inductance L after the annular material box is filled with the ferrite pre-burning powder, the internal and external uniformity of a magnetic field needs to be considered according to the ratio of the internal diameter to the external diameter of the annular material box, and the internal and external non-uniformity of the magnetic field also influences the testing accuracy. The utility model sets the ratio Do/Di of the inner diameter and the outer diameter of the magnetic field to be less than or equal to 1.4 under the double influence of comprehensively considering that the density of the conventional detection sample meets the detection requirement and the uniformity of the detection magnetic field.
The ratio of the distance H between the bottom of the annular groove and the bottom of the material box cover to the inner diameter and the outer diameter of the annular material box is defined together, so that the material box with a fixed containing volume can be obtained, and a sample with a fixed density can be prepared.
The use method of the annular material box in the test of the magnetization degree of the specific pre-sintered ferrite material is referred to as follows:
s1, accurately weighing a pre-sintered material sample to be measured with a set weight by using an electronic balance;
s2, preparing a pre-sintering material sample: loading pre-sintering material powder to be detected into an annular non-magnetic material box, pressing a material box cover into an annular groove filled with the powder, and enabling the upper plane of the material box to be flush with the upper plane of the material box cover to prepare an annular pre-sintering material sample;
and S3, carrying out closed magnetic circuit inductance test on the annular pre-sintered material sample to obtain the inductance of the annular pre-sintered material sample.
And calculating the corresponding magnetic permeability of the pre-sintering material according to the related inductance data, wherein the ratio of the magnetic permeability of the pre-sintering material to the standard magnetic permeability required by the ferrite is the pre-sintering magnetization degree of the material.
In order to improve the adaptability of the cartridge and the detection accuracy, the ratio Do/Di of the outer diameter and the inner diameter of the annular groove is preferably 1.3-1.4.
Preferably, the outer diameter of the annular groove is Do not more than 100mm, and the inner diameter is Di not less than 10 mm.
Further preferably, the outer diameter of the annular groove is Do and is 40-100 mm, the inner diameter of the annular groove is Di and is 30-72 mm, and the distance H between the bottom of the annular groove and the bottom of the material box cover is 15-45 mm.
The distance H between the bottom of the annular groove and the bottom of the material box cover is the thickness of the prepared sample, the final sample filling density is controlled by the thickness control of the sample and the annular size, the preparation stability and repeatability of the sample are further controlled, and the stability and the comparability of the detection result are influenced.
The inner diameter of the annular material box is too small, so that the problem of internal winding coil arrangement exists, and the winding coils are not distributed in enough space; too large outer diameter, too much powder and inconvenient testing. The height of the material box is too high, and the coil uses too long wires, so that the coil is not easy to manufacture, and the accuracy of a detection result is influenced.
The number of turns of the winding can be 1-30 Ts.
In the preferable range, the prepared annular powder sample is more stable and uniform in filling density and suitable for measuring the pre-sintered magnetization, the size can better match the magnetic field uniformity and the coil space arrangement required by closed-loop inductance measurement, and the overall detection accuracy is higher in the process of applying the annular material box and testing the magnetization of the pre-sintered powder.
Preferably, the annular cartridge is made of a non-magnetic material.
Wherein, the non-magnetic material box can be made of engineering plastics such as ABS, POM, PC, PVC, PTFE, PMMA, phenolic plastics (bakelite) and the like.
Further, PMMA (polymethyl methacrylate, also known as plexiglass), POM (polyoxymethylene polyformalehyde thermoplastic crystalline polymer), or the like may be preferable.
The non-magnetic material box needs to have non-magnetism and certain mechanical strength, can well meet the performance by adopting the material, and has good processing performance.
Preferably, the cartridge cover is provided with a lifting device.
The drawing device can be a pull ring or a handle, the material box cover can be well taken by the drawing device, a convenient stress point can be provided when the groove of the material box body is clamped and embedded, powder is better compressed, and a powder sample which meets the filling density is prepared.
Preferably, the periphery of the material box cover is provided with a convex block, the inner periphery of the annular groove of the material box body is provided with a groove, and the material box cover and the annular groove are matched and clamped with the groove through the convex block.
Through lug and recess matching inlay card not only make things convenient for the magazine lid inlay card in annular groove, and convenient operation, it is spacing clear and definite, can follow accurate fixed accommodation space.
Preferably, the periphery of the material box cover is provided with external threads, the inner periphery of the annular groove of the material box body is provided with internal threads, and the material box cover and the annular groove are connected with the external threads in a screwing and clamping manner through the internal threads. The outer threads are arranged on the periphery of the material box cover, the inner threads are arranged on the inner periphery of the annular groove of the material box body, the inner threads and the outer threads are matched for use, powder fillers can be well compressed in the screwing process, and a powder sample meeting the filling density is prepared.
Preferably, the upper surface of the cartridge cover is provided with an anti-skid pitted surface.
Preferably, the outer peripheral surface of the cartridge body is provided with an anti-skid pitted surface.
The anti-skid surface can be provided with relevant anti-skid strips or anti-skid patterns for treatment, and can also be provided with a pitted surface. The anti-slip surface treatment can increase friction force when the material box is taken, prevent dropping, and can be conveniently stressed when being clamped and embedded with or screwed on the material box cover, and the ferrite pre-sintering powder sample with stable density is prepared by better clamping and screwing.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an annular material box applied to magnetic material pre-sintering powder sample preparation, wherein a material box cover can be completely embedded in an annular groove of a material box body, the annular groove is used for accommodating materials, the bottom of the material box cover is in contact with the upper surface of the materials, and a special accommodating space is arranged to prepare the pre-sintering powder sample with the filling density meeting the relevant set requirements.
Drawings
Fig. 1 is a schematic structural view of an annular magazine in an open state according to embodiment 1.
FIG. 2 is a schematic structural view showing a state where the preparation of the annular magazine is completed in example 1.
FIG. 3 is a vertical sectional view of the ring-shaped magazine of example 1 in a state where the ring-shaped magazine is completely filled.
Fig. 4 is a schematic structural view of an annular magazine in an open state according to embodiment 2.
FIG. 5 is a schematic structural view showing a state where the preparation of the annular magazine is completed in example 1.
Fig. 6 is a schematic structural view of an annular magazine in an open state according to embodiment 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1
The annular material box comprises a material box body 1 and a material box cover 2, wherein the material box cover can be embedded in an annular groove 3 of the material box body 1 in a clamping mode, the annular groove is used for containing materials, the bottom of the material box cover is in surface contact with the materials, the distance between the bottom of the annular groove and the bottom of the material box cover is H, H is smaller than or equal to 50mm, and the ratio Do/Di of the outer diameter to the inner diameter of the annular groove is smaller than or equal to 1.4.
The material box can be applied to the magnetization degree test of the ferrite pre-sintering material, and the specific use method can be referred to as follows:
s1, accurately weighing a pre-sintered material sample to be measured with a set weight by using an electronic balance;
s2, preparing a pre-sintering material sample: loading pre-sintering material powder to be detected into an annular non-magnetic material box, pressing a material box cover into an annular groove filled with the powder, and enabling the upper plane of the material box to be flush with the upper plane of the material box cover to prepare an annular pre-sintering material sample, wherein the annular pre-sintering material sample is shown in figure 2;
and S3, carrying out closed magnetic circuit inductance test on the annular pre-sintered material sample to obtain the inductance of the annular pre-sintered material sample.
And calculating the corresponding magnetic permeability of the pre-sintering material according to the related inductance data, wherein the ratio of the magnetic permeability of the pre-sintering material to the standard magnetic permeability required by the ferrite is the pre-sintering magnetization degree of the material.
A cross-sectional view of the cartridge during use is shown in figure 3,
example 2
The annular material box comprises a material box body 1 and a material box cover 2, wherein the material box cover can be embedded in an annular groove 3 of the material box body 1 in a clamping mode, the annular groove is used for containing materials, the bottom of the material box cover is in surface contact with the materials, the distance between the bottom of the annular groove and the bottom of the material box cover is H, H is smaller than or equal to 50mm, the ratio Do/Di of the outer diameter to the inner diameter of the annular groove is smaller than or equal to 1.4, and a lifting device 4 is arranged on the material box cover.
The material box can be applied to the magnetization degree test of the ferrite pre-sintering material, and the specific use method can be referred to as follows:
s1, accurately weighing a pre-sintered material sample to be measured with a set weight by using an electronic balance;
s2, preparing a pre-sintering material sample: loading pre-sintering material powder to be detected into an annular non-magnetic material box, pressing a material box cover into an annular groove filled with the powder, and enabling the upper plane of the material box to be flush with the upper plane of the material box cover to prepare an annular pre-sintering material sample, wherein the annular pre-sintering material sample is shown in figure 5;
and S3, carrying out closed magnetic circuit inductance test on the annular pre-sintered material sample to obtain the inductance of the annular pre-sintered material sample.
And calculating the corresponding magnetic permeability of the pre-sintering material according to the related inductance data, wherein the ratio of the magnetic permeability of the pre-sintering material to the standard magnetic permeability required by the ferrite is the pre-sintering magnetization degree of the material.
Example 3
The annular material box comprises a material box body 1 and a material box cover 2, wherein the material box cover can be embedded in an annular groove 3 of the material box body 1 in a clamping mode, the annular groove is used for containing materials, the bottom of the material box cover is in surface contact with the materials, the distance between the bottom of the annular groove and the bottom of the material box cover is H, H is not more than 50mm, the ratio Do/Di of the outer diameter to the inner diameter of the annular groove is not more than 1.4, a lifting device 4 is arranged on the material box cover, an external thread 5 is arranged on the periphery of the material box cover, an internal thread 6 is arranged on the inner periphery of the annular groove of the material box body, the material box cover and the annular groove are in screwed clamping and embedding through the internal thread and the external thread, and an anti-skid pitted surface 7 is arranged on the outer peripheral surface of the material box body.
The material box can be applied to the magnetization degree test of the ferrite pre-sintering material, and the specific use method can be referred to as follows:
s1, accurately weighing a pre-sintered material sample to be measured with a set weight by using an electronic balance;
s2, preparing a pre-sintering material sample: loading pre-sintering material powder to be detected into an annular non-magnetic material box, pressing a material box cover into an annular groove filled with the powder, and enabling the upper plane of the material box to be flush with the upper plane of the material box cover to prepare an annular pre-sintering material sample;
and S3, carrying out closed magnetic circuit inductance test on the annular pre-sintered material sample to obtain the inductance of the annular pre-sintered material sample.
And calculating the corresponding magnetic permeability of the pre-sintering material according to the related inductance data, wherein the ratio of the magnetic permeability of the pre-sintering material to the standard magnetic permeability required by the ferrite is the pre-sintering magnetization degree of the material.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The annular material box is characterized by comprising a material box body (1) and a material box cover (2), wherein the material box cover can be completely embedded in an annular groove (3) of the material box body (1), the annular groove (3) is used for containing materials, and the bottom of the material box cover is in surface contact with the materials.
2. The ring-shaped material box applied to sample preparation of the magnetic material pre-burning powder in the claim 1, wherein the distance between the bottom of the ring-shaped groove and the bottom of the material box cover is H, H is less than or equal to 50mm, and the ratio Do/Di of the outer diameter and the inner diameter of the ring-shaped groove is less than or equal to 1.4.
3. The annular magazine applied to the sample preparation of the magnetic material pre-burning powder in the claim 2, wherein the outer diameter of the annular groove is Do not more than 100mm, and the inner diameter is Di not less than 10 mm.
4. The ring-shaped material box applied to the sample preparation of the magnetic material pre-burning powder material as claimed in claim 3, wherein the outer diameter of the ring-shaped groove is 40-100 mm, the inner diameter is 30-72 mm, and the distance H between the bottom of the ring-shaped groove and the bottom of the material box cover is 15-45 mm.
5. The annular material box applied to the sample preparation of the magnetic material pre-sintering powder as claimed in any one of claims 1 to 4, wherein the annular material box is prepared from a non-magnetic material.
6. The ring-shaped magazine for preparing samples from pre-burning powder with magnetic materials according to claim 5, wherein a lifting device is arranged on the magazine cover.
7. The ring-shaped magazine for preparing samples from magnetic material pre-burning powder according to claim 1, wherein the magazine cover is provided with a projection on the outer periphery, the magazine body is provided with a groove on the inner periphery of the ring-shaped groove, and the magazine cover and the ring-shaped groove are matched and clamped with each other through the projection and the groove.
8. The ring-shaped magazine applied to sample preparation of magnetic material pre-burning powder as claimed in claim 1, wherein the magazine cover is provided with external threads on the outer periphery, the magazine body is provided with internal threads on the inner periphery of the annular groove, and the magazine cover and the annular groove are in screwed and clamped engagement with the external threads through the internal threads.
9. The ring-shaped magazine for preparing samples from pre-burning powder with magnetic materials according to claim 8, wherein the upper surface of the magazine cover is provided with an anti-skid pitted surface.
10. The ring-shaped magazine for preparing samples from pre-burning powder of magnetic materials according to claim 1, wherein the outer circumferential surface of the magazine body is provided with an anti-slip pitted surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021214104482 | 2021-06-23 | ||
| CN202121410448 | 2021-06-23 |
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| Publication Number | Publication Date |
|---|---|
| CN215867068U true CN215867068U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121742170.9U Active CN215867068U (en) | 2021-06-23 | 2021-07-28 | Be applied to annular magazine of magnetic material powder system appearance of presintering |
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| CN (1) | CN215867068U (en) |
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2021
- 2021-07-28 CN CN202121742170.9U patent/CN215867068U/en active Active
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