Magnetic core and processing technology thereof

Abstract

The invention relates to the technical field of magnetic core processing, in particular to a magnetic core and a processing technology thereof. The process comprises the following steps: step 1, preparing a magnetic core raw material; secondly, an insert is installed at the opening and closing position of the mold; 3, the magnetic core raw materials are added into a mold to be extruded and formed; 4, the insert and the magnetic core semi-finished product are sintered together, and a magnetic core product is obtained; according to the magnetic core obtained through the magnetic core machining technology, the hole is formed in the magnetic core, the insert is installed in the hole, and the part of the insert is connected with the mold; according to the invention, the insert is detachably mounted on the mold, so that the magnetic core product can be taken down from the mold together with the insert, and then subsequent sintering processing is carried out, so that the magnetic core with a groove structure is prevented from being scratched and damaged in the opening and closing process of the mold.

Description

Technical Field

[0001] This invention relates to the field of magnetic core processing technology, and more specifically, to a magnetic core and its processing technology. Background Technology

[0002] The magnetic core is a sintered magnetic metal oxide composed of various iron oxide mixtures. During the sintering process, the particles of the powder material bond together to form a dense solid material.

[0003] An existing patent application (CN202010611396.9) discloses a method for processing a magnetic core for a power supply. This method involves using a forming column to press holes in the material, forming a magnetic core product with heat dissipation grooves within the mold assembly. By performing a one-time forming process of the heat dissipation grooves during molding, the need for secondary grooving of the magnetic core is reduced. However, during the processing of the magnetic core using the above method, the forming column can scratch the semi-finished magnetic core when the mold is reopened, thus affecting the forming effect of the heat dissipation grooves on the magnetic core product. Summary of the Invention

[0004] To achieve the desired molding effect of magnetic core products with slotted structures, the present invention adopts the following technical solution:

[0005] The purpose of this invention is to provide a solution for detachably installing inserts on a mold, so that the magnetic core product can be removed from the mold along with the inserts for subsequent sintering processing, thereby avoiding scratching and damage to the magnetic core with the groove structure during the opening and closing of the mold.

[0006] To achieve the above objectives, the present invention provides a magnetic core processing technology, comprising the following steps:

[0007] Step 1: Prepare the magnetic core materials;

[0008] Step 2: Install the insert at the opening and closing points of the mold;

[0009] Step 3: Add the magnetic core material into the mold and extrude it into shape;

[0010] Step 4: Sinter the insert together with the semi-finished magnetic core to obtain the magnetic core product.

[0011] The magnetic core processed using the magnetic core processing technology of this application has a hole inside, and an insert is installed in the hole. The insert is connected to the mold.

[0012] Among them, the insert I of this application can be made of high-temperature resistant fiber rod or high-temperature resistant glass. Attached Figure Description

[0013] The following figures are intended only to illustrate and explain the present invention, wherein:

[0014] Figure 1 This is a flowchart of the magnetic core processing technology of the present invention;

[0015] Figure 2 This is a schematic diagram of the mold structure of the present invention. Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the mold structure of the present invention. Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the magnetic core structure of the present invention. Figure 1 ;

[0018] Figure 5 This is a schematic diagram of the magnetic core structure of the present invention. Figure 2 ;

[0019] Figure 6 This is a schematic diagram of the mold structure of the present invention. Figure 3 ;

[0020] Figure 7 This is a schematic diagram of the mold structure of the present invention. Figure 4 ;

[0021] Figure 8 This is a schematic diagram of the mold structure of the present invention. Figure 5 .

[0022] In the figure: base 1; arc end 11; threaded end 12; insert I 13; insert II 14; pressure feeding cavity 21; rotation control end 22; filling pipe 23; molding cavity 24; transition sealing plate 25; opening and closing mold assembly 31; sliding arm 32; drive block 33; double-ended lead screw 34; extrusion piston 41; telescopic actuator 42. Detailed Implementation

[0023] To improve the forming effect of magnetic core products with groove structures, this invention provides a magnetic core processing technology, including the following steps:

[0024] Step 1: Prepare the magnetic core materials;

[0025] Step 2: Install the insert at the opening and closing points of the mold;

[0026] Step 3: Add the magnetic core material into the mold and extrude it into shape;

[0027] Step 4: Sinter the insert together with the semi-finished magnetic core to obtain the magnetic core product.

[0028] The magnetic core processed using the magnetic core processing technology of this application has a hole inside, and an insert is installed in the hole. The insert is connected to the mold.

[0029] Among them, the insert I13 of this application can be made of high-temperature resistant fiber rod or high-temperature resistant glass.

[0030] The following describes specific embodiments of the present invention.

[0031] Reference Figure 2-3 and Figure 6-8 The diagram illustrates the specific structure of the mold used in the magnetic core processing technology provided by this invention:

[0032] The mold of this application consists of a feeding cavity 21, a forming cavity 24, two opening and closing mold assemblies 31 and an extrusion piston 41. The forming cavity 24 is connected to the feeding cavity 21. The two opening and closing mold assemblies 31 are movably installed on the other side of the forming cavity 24. The extrusion piston 41 is slidably installed in the feeding cavity 21.

[0033] One end of the compression chamber 21 is fixedly equipped with a telescopic driver 42 for driving the extrusion piston 41 to move. The telescopic driver can be an electric telescopic rod or a hydraulic cylinder. Multiple air holes are provided at the position where the telescopic driver 42 is installed in the compression chamber 21 so that the extrusion piston 41 can slide smoothly in the compression chamber 21.

[0034] The side of the extrusion piston 41 is provided with a baffle to prevent the magnetic core material from leaking from the filling pipe 23 to the upper side of the extrusion piston 41.

[0035] Reference Figure 2-3 The following are examples illustrating how the magnetic core processing technology provided by the present invention can produce semi-finished magnetic cores with various cross-sectional shapes:

[0036] The cross-section of the hollow area inside the pressure feeding cavity 21 and the forming cavity 24 of this application is circular or polygonal, and the side of the extrusion piston 41 is in contact with the inner surface of the pressure feeding cavity 21 and the forming cavity 24.

[0037] By activating the telescopic actuator 42, the extrusion piston 41 is driven to extrude the magnetic core material in the extrusion chamber 21, so that it is formed in the forming chamber 24, and processed into magnetic core semi-finished products with various cross-sectional shapes.

[0038] Reference Figure 4-5 The illustration shows an embodiment of the magnetic core processing technology provided by the present invention that avoids scratching and damaging the magnetic core with a groove structure during the mold opening and closing process:

[0039] The magnetic core of this application has a hole inside, and an insert is installed in the hole. The insert is connected to the mold.

[0040] Specifically: The inserts include insert I13 and insert II14. Insert I13 is provided in the hole of the magnetic core, and insert II14 is detachably installed on insert I13. Insert II14 is installed on the mold.

[0041] The above operations allow for the detachable installation of inserts on the mold, enabling the magnetic core product to be removed from the mold along with the inserts before subsequent sintering processing. This avoids scratching and damaging the slotted magnetic core during the mold opening and closing process.

[0042] Reference Figure 2-5 and Figure 7-8 The following is an embodiment illustrating how the magnetic core processing technology provided by the present invention increases the ease of installation of inserts on the mold:

[0043] The insert I13 and insert II14 of this application can be connected by interlocking snap-fit ​​or by threaded connection. The setting of insert II14 can increase the ease of installation of the insert on the mold.

[0044] Specifically: After the two opening and closing mold components 31 are opened, the insert II 14 will be exposed. At this time, the insert II 14 is used as a handle to hold and transport the semi-finished magnetic core, avoiding direct squeezing and damage to the semi-finished magnetic core itself, thereby increasing the final processing effect of the magnetic core product.

[0045] Reference Figure 5 The illustration shows an embodiment of adjusting the assembly / disassembly state of insert I13 according to the usage requirements of the magnetic core in the magnetic core processing technology provided by the present invention:

[0046] The insert I13 of this application can be removed from the magnetic core after the magnetic core sintering process, thereby obtaining a magnetic core product with an internal hole structure.

[0047] In addition, insert I13 can also be installed on the magnetic core by bonding. By utilizing the strength of insert I13 itself, the diameter of the magnetic core product can be increased, thereby increasing the strength of the magnetic core product.

[0048] Reference Figure 2-3 The following is an example illustrating how the magnetic core processing technology provided by the present invention avoids leakage of magnetic core raw materials:

[0049] The molding cavity 24 of this application is equipped with a heating component to accelerate the initial molding of the magnetic core material.

[0050] The pressing chamber 21 and the forming chamber 24 are connected by two transition sealing plates 25. The contact surface between the two forming chambers 24 is larger, which increases the sealing effect and prevents leakage of magnetic core material.

[0051] Reference Figure 2-3 and Figure 7-8The illustration shows an embodiment of the magnetic core processing technology provided by the present invention, which involves controlling the opening and closing movement of two opening and closing mold assemblies 31 to perform a clamping operation on the insert:

[0052] The opening and closing mold assembly 31 of this application is connected to a transition sealing plate 25 on one side via a sliding arm 32. The sliding arm 32 is fitted and slidably connected to the transition sealing plate 25. A drive block 33 is installed on the sliding arm 32. A double-ended lead screw 34 is rotatably installed on the transition sealing plate 25. The double-ended lead screw 34 is connected to the drive blocks 33 on the two opening and closing mold assemblies 31 via threaded transmission.

[0053] The double-ended lead screw 34 has a gear structure in the middle. The double-ended lead screw 34 can be rotated and driven by a stepper motor and a belt assembly to control the opening and closing mold assemblies 31 on both sides to move synchronously in opposite directions, so as to realize the opening and closing operation of the two opening and closing mold assemblies 31, to clamp and release the insert, and to form a channel for taking out the semi-finished magnetic core after the two opening and closing mold assemblies 31 are fully opened.

[0054] Reference Figure 2-3 The following is an example illustrating the method of injecting a fixed amount of magnetic core raw material into the pressure feeding cavity 21 in the magnetic core processing technology provided by the present invention:

[0055] The side of the pressure conveying cavity 21 of this application is connected to a filling pipe 23, a valve is installed on the filling pipe 23, and the other end of the filling pipe 23 is connected to the raw material conveying pump through a quick-release connector and a pipeline.

[0056] Start the raw material delivery pump and inject a fixed amount of magnetic core material into the pressure delivery chamber 21.

[0057] Reference Figure 2-3 The following is an embodiment illustrating how the magnetic core processing technology provided by the present invention improves the convenience of handling semi-finished magnetic cores:

[0058] The pressure delivery cavity 21 of this application is rotatably mounted on the base 1.

[0059] Specifically: A rotation control end 22 is provided on the rotating shaft on the side of the pressure chamber 21. The rotation control end 22 can be a handle or a motor output shaft.

[0060] The pressing chamber 21 is rotated on the base 1 by manual or motor control, so that the forming chamber 24 faces downward during the extrusion process of the magnetic core material, so that the magnetic core material flows from the filling pipe 23 to the bottom of the pressing chamber 21; after the extrusion operation of the magnetic core material is completed, the forming chamber 24 faces upward, so that the magnetic core semi-finished product can be taken out for subsequent sintering treatment.

[0061] Reference Figure 3-5The following is an embodiment illustrating how the magnetic core processing technology provided by the present invention increases the ease of disassembly and installation of the magnetic core product on the equipment being used:

[0062] The magnetic core of this application has a threaded groove on the side, and the magnetic core is composed of an arc-shaped end 11 and a threaded end 12.

[0063] When the two opening and closing mold assemblies 31 close, the compressed magnetic core material forms a thread structure under the action of the two opening and closing mold assemblies 31, thus completing the processing of the thread grooves on the magnetic core.

[0064] The magnetic core has a threaded groove design, which allows it to be screwed into and installed on the designated equipment, thus facilitating the disassembly and installation of the magnetic core product on the equipment.

[0065] Furthermore, the magnetic core can be configured as a T-shaped structure, with the threaded groove located at one end of the T-shaped structure. After the magnetic core is installed on the device, the device itself can cover the threaded groove, further enhancing the effectiveness of screwing the magnetic core into the designated device.

Claims

1. A magnetic core processing technology, characterized in that, Includes the following steps: Step 1: Prepare the raw materials for the magnetic core; Step 2: Install the insert at the opening and closing points of the mold; Step 3: Add the magnetic core material into the mold and extrude it into shape; Step 4: Sinter the insert together with the semi-finished magnetic core to obtain the magnetic core product.

2. The magnetic core processing technology according to claim 1, characterized in that: The mold consists of a pressing cavity (21), a forming cavity (24), two opening and closing mold assemblies (31) and a squeezing piston (41). The forming cavity (24) is connected to the pressing cavity (21). The two opening and closing mold assemblies (31) are movably installed on the other side of the forming cavity (24), and the squeezing piston (41) is slidably installed in the pressing cavity (21).

3. The magnetic core processing technology according to claim 2, characterized in that: The cross-section of the hollow area inside the pressing cavity (21) and the forming cavity (24) is circular or polygonal.

4. The magnetic core processing technology according to claim 2, characterized in that: The side of the extrusion piston (41) is in contact with the inner surface of the extrusion chamber (21) and the forming chamber (24).

5. The magnetic core processing technology according to claim 2, characterized in that: The side of the pressure delivery cavity (21) is connected to a filling pipe (23).

6. The magnetic core processing technology according to claim 2, characterized in that: The pressurizing cavity (21) is rotatably mounted on the base (1).

7. A magnetic core processed using the magnetic core processing technology according to claim 1, characterized in that: The magnetic core has holes inside.

8. The magnetic core according to claim 7, characterized in that: An insert I (13) is provided in the hole of the magnetic core, and an insert II (14) is detachably installed on the insert I (13). The insert II (14) is installed on the mold.

9. The magnetic core according to claim 7, characterized in that: The magnetic core has a threaded groove on its side.

10. The magnetic core according to claim 9, characterized in that: The magnetic core has a T-shaped structure, with a threaded groove located at one end of the T-shaped structure.

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