EQ type magnetic powder core and preparation mold of EQ type magnetic powder core

Abstract

The invention relates to the technical field of magnetic powder cores, and provides an EQ type magnetic powder core and a preparation mold of the EQ type magnetic powder core. The EQ type magnetic powder core comprises a first magnetic powder core and a second magnetic powder core, the first magnetic powder core comprises a magnetic powder bottom plate and a pair of magnetic powder side columns, the pair of magnetic powder side columns are oppositely arranged at the two ends of the magnetic powder bottom plate, and the second magnetic powder core is arranged between the pair of magnetic powder side columns; and the height of the second magnetic powder core is greater than that of the magnetic powder side column. According to the EQ type magnetic powder core, the height of the second magnetic powder core is set to be larger than the height of the magnetic powder side column, so that the second magnetic powder core has high magnetic flux density, the performance of the EQ type magnetic powder core is improved, and the applicability of the EQ type magnetic powder core is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic powder cores, and in particular to an EQ type magnetic powder core and a preparation mold for the EQ type magnetic powder core. Background Art

[0002] Magnetic powder cores are mainly divided into annular magnetic powder cores and combined magnetic powder cores according to their shapes and structures. Most combined magnetic powder cores are composed of upper and lower yokes and side columns, and some have middle columns. The upper and lower yokes are generally long strips or runway-shaped, and the side columns are generally runway-shaped or cylindrical. Magnetic powder cores of these shapes can be pressed using upper and lower dies, and the pressing tonnage can reach 18t / cm².

[0003] However, some combination magnetic powder cores with special shapes, such as EQ magnetic powder cores, cannot meet their structural requirements by using only upper and lower molds. A structure of one upper mold and multiple lower molds is required to achieve the required shape. Due to the complex mold structure design, the pressing tonnage of this type of magnetic powder core can only reach 10-12t / cm², which greatly reduces the performance of the EQ magnetic powder core. Summary of the invention

[0004] The invention provides an EQ type magnetic powder core and a preparation mold of the EQ type magnetic powder core, which are used to solve the defect that the performance of the EQ type magnetic powder core prepared in the prior art is reduced.

[0005] The present invention provides an EQ type magnetic powder core, comprising: a first magnetic powder core and a second magnetic powder core, wherein the first magnetic powder core comprises: a magnetic powder base plate and a pair of magnetic powder side columns, wherein the pair of magnetic powder side columns are relatively arranged at two ends of the magnetic powder base plate, and the second magnetic powder core is arranged between the pair of magnetic powder side columns; and the height of the second magnetic powder core is greater than the height of the magnetic powder side columns.

[0006] According to an EQ type magnetic powder core provided by the present invention, the height difference between the second magnetic powder core and the magnetic powder side column is 0.1mm-0.2mm.

[0007] According to an EQ type magnetic powder core provided by the present invention, the density of the second magnetic powder core is greater than the density of the magnetic powder side column.

[0008] According to an EQ type magnetic powder core provided by the present invention, the difference between the density of the second magnetic powder core and the density of the magnetic powder side column is 0.10 g / cm³-0.15g / cm³.

[0009] According to an EQ type magnetic powder core provided by the present invention, the surface of the magnetic powder side column facing away from the second magnetic powder core is a plane, and the surface of the magnetic powder side column facing the second magnetic powder core is an arc surface.

[0010] According to an EQ type magnetic powder core provided by the present invention, the second magnetic powder core is a cylindrical structure.

[0011] The present invention also provides a preparation mold for the EQ type magnetic powder core based on any of the above items, comprising: a mold ring, a punch assembly and a punch, the mold ring being provided with a through hole, one end of the punch assembly being located in the through hole; the through hole and the end of the punch assembly being configured to form a mold cavity when the EQ type magnetic powder core is formed, the structure of the mold cavity matches the shape of the EQ type magnetic powder core, and the height of the mold cavity is greater than the height of the EQ type magnetic powder core; the punch is used to press the magnetic powder into the EQ type magnetic powder core.

[0012] According to a preparation mold for an EQ type magnetic powder core provided by the present invention, the punch assembly includes: a first punch, a second punch and a third punch; the first end of the first punch is located in the through hole, and the distance between the end face of the first end of the first punch and the end face of the mold ring is greater than the height of the EQ type magnetic powder core; the second punch is sleeved in the first punch, the first end of the second punch extends beyond the first end of the first punch, and the height difference between the second punch and the first punch is greater than the height of the magnetic powder side column; the third punch is sleeved in the second punch, the first end of the third punch is located below the first end of the first punch, and the third punch is a solid punch.

[0013] According to the mold for preparing an EQ type magnetic powder core provided by the present invention, the height difference between the first end of the third punch and the first end of the first punch is 0.1 mm-0.2 mm.

[0014] According to a preparation mold for an EQ type magnetic powder core provided by the present invention, it also includes a plurality of gaskets, which are respectively arranged below the first punch rod and below the second punch rod; the gaskets are used to adjust the distance between the first end of the first punch rod and the end face of the mold ring, and the distance between the second punch rod and the first punch rod.

[0015] The EQ type magnetic powder core provided by the present invention has a higher magnetic flux density by setting the height of the second magnetic powder core to be greater than the height of the magnetic powder side column, thereby improving the performance of the EQ type magnetic powder core and enhancing the applicability of the EQ type magnetic powder core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a top view of the EQ type magnetic powder core provided by the present invention.

[0018] Figure 2 It is one of the structural schematic diagrams of the mold for preparing the EQ type magnetic powder core provided by the present invention.

[0019] Figure 3 This is the second structural schematic diagram of the mold for preparing the EQ type magnetic powder core provided by the present invention.

[0020] Figure 4 This is the third structural schematic diagram of the mold for preparing the EQ type magnetic powder core provided by the present invention.

[0021] Reference numerals: 1. EQ type magnetic powder core; 11. magnetic powder bottom plate; 12. magnetic powder side column; 20. second magnetic powder core; 100, die ring; 110, first punch; 120, second punch; 130, third punch; 140, punch. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Combine the following Figure 1-Figure 4 The present invention describes an EQ type magnetic powder core and a mold for preparing the EQ type magnetic powder core.

[0028] like Figure 1 As shown, in an embodiment of the present invention, the EQ type magnetic powder core 1 includes: a first magnetic powder core and a second magnetic powder core 20, the first magnetic powder core includes: a magnetic powder base plate 11 and a pair of magnetic powder side columns 12, the pair of magnetic powder side columns 12 are relatively arranged at both ends of the magnetic powder base plate 11, the second magnetic powder core 20 is arranged between the pair of magnetic powder side columns 12, and the height of the second magnetic powder core 20 is greater than the height of the magnetic powder side columns 12.

[0029] Specifically, when preparing the EQ type magnetic powder core 1 in the prior art, the complicated preparation mold results in a significant decrease in the pressing tonnage of the EQ type magnetic powder core 1 during molding compared to other combined magnetic powder cores, which in turn affects the performance of the EQ type magnetic powder core. In the prior art, the height of the magnetic powder side column 12 is equal to that of the second magnetic powder core 20, that is, the magnetic flux density of the magnetic powder side column 12 is equal to that of the second magnetic powder core 20. In this embodiment, the first magnetic powder core and the second magnetic powder core 20 are configured to form an EQ type magnetic powder core 1, wherein the height of the second magnetic powder core 20 is greater than the height of the magnetic powder side column 12, so that the EQ type magnetic powder core has a high magnetic flux density, thereby improving the performance of the EQ type magnetic powder core 1.

[0030] The EQ type magnetic powder core provided in the embodiment of the present invention has a higher magnetic flux density by setting the height of the second magnetic powder core to be greater than the height of the magnetic powder side column, thereby improving the performance of the EQ type magnetic powder core and enhancing the applicability of the EQ type magnetic powder core.

[0031] Optionally, in an embodiment of the present invention, the height difference between the second magnetic powder core 20 and the magnetic powder side column 12 is 0.1 mm-0.2 mm.

[0032] In an embodiment of the present invention, the density of the second magnetic powder core 20 is greater than the density of the magnetic powder side column 12. Optionally, the density difference between the second magnetic powder core 20 and the magnetic powder side column 12 is 0.10 g / cm³-0.15 g / cm³ to improve the performance of the EQ type magnetic powder core 1.

[0033] like Figure 1 As shown, in the embodiment of the present invention, the surface of each magnetic powder side column 12 facing away from the second magnetic powder core 20 is a plane, and the surface of each magnetic powder side column 12 facing the second magnetic powder core 20 is an arc surface. The second magnetic powder core 20 is a cylindrical structure.

[0034] like Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the present invention further provides a preparation mold for an EQ type magnetic powder core 1, comprising: a mold ring 100, a punch assembly and a punch 140, wherein the mold ring 100 is provided with a through hole, and one end of the punch assembly is located in the through hole. A magnetic powder accommodating space is formed between the end face of the punch assembly and the end face of the mold ring 100, wherein the height of the magnetic powder accommodating space is greater than the height of the EQ type magnetic powder core 1, and the magnetic powder accommodating space is used to accommodate magnetic powder, and the through hole and the end of the punch assembly are configured to form a mold cavity when the EQ type magnetic powder core 1 is formed, and the structure of the mold cavity matches the shape of the EQ type magnetic powder core 1. The punch 140 is used to press the magnetic powder into an EQ type magnetic powder core 1.

[0035] Specifically, in this embodiment, the EQ type magnetic powder core 1 is formed by pressing magnetic powder. Before pressing, one end of the punch assembly is set in the through hole of the die ring 100, and the space between the end face of the punch assembly and the end face of the die ring 100 forms a magnetic powder accommodating space, and the magnetic powder is placed in the magnetic powder accommodating space. Because the magnetic powder is in a loose structure before pressing, the height of the magnetic powder accommodating space is greater than the height of the EQ type magnetic powder core 1 after molding. In this embodiment, the height of the magnetic powder accommodating space is equal to the height of the EQ type magnetic powder core 1 multiplied by the compression ratio, and the compression ratio is the ratio of the compact density to the loose density of the magnetic powder.

[0036] The through hole of the die ring 100 and the end of the punch assembly form a cavity for molding the EQ type magnetic powder core 1. It can be seen that the shape of the end of the punch assembly matches the shape of the EQ type magnetic powder core 1, so that when the punch 140 presses the magnetic powder, the magnetic powder is pressed to form the EQ type magnetic powder core 1.

[0037] The preparation mold of the EQ type magnetic powder core provided in an embodiment of the present invention, the through hole of the mold ring and the end of the punch assembly are configured to form a cavity when the EQ type magnetic powder core is formed, and the structure of the cavity matches the shape of the EQ type magnetic powder core to form the EQ type magnetic powder core, so that the EQ type magnetic powder core has good performance.

[0038] In an embodiment of the present invention, the punch assembly includes: a first punch 110, a second punch 120 and a third punch 130. The first end of the first punch 110 is located in the through hole, and the distance between the end face of the first end of the first punch 110 and the end face of the die ring 100 is greater than the height of the EQ type magnetic powder core 1. The second punch 120 is sleeved in the first punch 110, and the first end of the second punch 120 extends beyond the first end of the first punch 110. The height difference between the second punch 120 and the first punch 110 is greater than the height of the magnetic powder side column 12. The third punch 130 is sleeved in the second punch 120, and the first end of the third punch 130 is located below the first end of the first punch 110. The third punch 130 is a solid punch.

[0039] Specifically, if Figure 2 As shown, in the filling position, the first end of the first punch 110 is located in the through hole, and the distance between the first end of the first punch 110 and the end face of the die ring 100 is greater than the height of the EQ type magnetic powder core 1. The first end of the second punch 120 extends beyond the first end of the first punch 110, and the height difference between the second punch 120 and the first punch 110 is determined according to the height of the magnetic powder side column 12, and is greater than the height of the magnetic powder side column 12. The distance between the first end of the second punch 120 and the end face of the die ring 100 is greater than the thickness of the magnetic powder bottom plate 11 of the EQ type magnetic powder core 1. The first end of the third punch 130 is located in the second punch 120, and there is a spacing between it and the first end of the first punch 110, and the spacing is 0.1mm-0.2mm. In this embodiment, the first punch 110 and the second punch 120 are both hollow rods, and the third punch 130 is a solid rod. The end surface of the first punch 110 is used to form the magnetic powder side column 12, and the third punch 130 is used to form the second magnetic powder core 20. The magnetic powder is arranged in the magnetic powder containing space, and the magnetic powder is flush with the end surface of the mold ring 100.

[0040] like Figure 3 As shown, in the forming position, the punch 140 contacts the magnetic powder, and the punch 140 presses down to press the magnetic powder into an EQ type magnetic powder core 1.

[0041] like Figure 4 As shown, in the demolding position, the first punch 110 , the second punch 120 and the third punch 130 all move upward, and the first ends of the first punch 110 , the second punch 120 and the third punch 130 are flush to push the EQ type magnetic powder core 1 out of the mold ring 100 .

[0042] In an embodiment of the present invention, by arranging the first end of the third punch 130 below the first end of the first punch 110, after the EQ type magnetic powder core 1 is formed, the height of the second magnetic powder core 20 of the EQ type magnetic powder core 1 can be made greater than the height of the magnetic powder side column 12, thereby improving the magnetic flux density of the EQ type magnetic powder core 1 under the same pressing force, thereby improving the performance of the EQ type magnetic powder core 1.

[0043] In an embodiment of the present invention, the preparation mold of the EQ type magnetic powder core 1 further includes a plurality of gaskets, which are respectively arranged below the first punch 110 and below the second punch 120. The gasket is used to adjust the distance between the first end of the first punch 110 and the end surface of the die ring 100 so that the height of the magnetic powder accommodating space meets the process requirements; at the same time, the gasket is also used to adjust the distance between the second punch 120 and the first punch 110 so that the height of the magnetic powder side column 12 meets the process requirements.

[0044] In an embodiment of the present invention, the preparation mold of the EQ type magnetic powder core 1 also includes: a first mold base, a second mold base and a third mold base, the first mold base is connected to the second end of the first punch rod 110, the second mold base is connected to the second end of the second punch rod 120, and the third mold base is connected to the second end of the third punch rod 130, wherein the first mold base and the second mold base are both hollow structures, the second punch rod 120 is inserted into the first mold base, the third punch rod 130 is inserted into the second mold base, and the third mold base is a solid structure.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An EQ type magnetic powder core, characterized in that: include: A first magnetic powder core and a second magnetic powder core, wherein the first magnetic powder core comprises: a magnetic powder base plate and a pair of magnetic powder side columns, wherein the pair of magnetic powder side columns are arranged at two ends of the magnetic powder base plate opposite to each other, and the second magnetic powder core is arranged between the pair of magnetic powder side columns; The height of the second magnetic powder core is greater than the height of the magnetic powder side column.

2. The EQ type magnetic powder core according to claim 1, characterized in that: The height difference between the second magnetic powder core and the magnetic powder side column is 0.1mm-0.2mm.

3. The EQ type magnetic powder core according to claim 1, characterized in that: The density of the second magnetic powder core is greater than the density of the magnetic powder side column.

4. The EQ type magnetic powder core according to claim 3, characterized in that: The difference between the density of the second magnetic powder core and the density of the magnetic powder side column is 0.10 g / cm³-0.15 g / cm³.

5. The EQ type magnetic powder core according to claim 1, characterized in that: The surface of the magnetic powder side column facing away from the second magnetic powder core is a plane, and the surface of the magnetic powder side column facing the second magnetic powder core is an arc surface.

6. The EQ type magnetic powder core according to claim 1, characterized in that: The second magnetic powder core is a cylindrical structure.

7. A mold for preparing an EQ type magnetic powder core according to any one of claims 1 to 6, characterized in that: include: A die ring, a punch assembly and a punch, wherein the die ring is provided with a through hole, and one end of the punch assembly is located in the through hole; The through hole and the end of the punch assembly are configured to form a cavity when the EQ type magnetic powder core is formed, the structure of the cavity matches the shape of the EQ type magnetic powder core, and the height of the cavity is greater than the height of the EQ type magnetic powder core; The punch is used to press the magnetic powder into the EQ type magnetic powder core.

8. The mold for preparing the EQ type magnetic powder core according to claim 7, characterized in that: The punch assembly comprises: a first punch, a second punch and a third punch; The first end of the first punch is located in the through hole, and the distance between the end surface of the first end of the first punch and the end surface of the die ring is greater than the height of the EQ type magnetic powder core; The second punch rod is sleeved in the first punch rod, the first end of the second punch rod extends beyond the first end of the first punch rod, and the height difference between the second punch rod and the first punch rod is greater than the height of the magnetic powder side column; The third punch rod is sleeved in the second punch rod, the first end of the third punch rod is located below the first end of the first punch rod, and the third punch rod is a solid punch rod.

9. The mold for preparing the EQ type magnetic powder core according to claim 8, characterized in that: A height difference between the first end of the third punch and the first end of the first punch is 0.1 mm-0.2 mm.

10. The mold for preparing the EQ type magnetic powder core according to claim 8, characterized in that: It also includes a plurality of gaskets, which are respectively arranged below the first punch rod and below the second punch rod; The gasket is used to adjust the distance between the first end of the first punch and the end surface of the die ring, and the distance between the second punch and the first punch.

Images