Grinding clamp for ferrite magnetic core

Abstract

The utility model discloses a ferrite magnetic core grinding clamp which comprises a base, a plurality of containing grooves are formed in the bottom of the base, passing grooves used for allowing a middle column and two side edges of an E-shaped magnetic core to penetrate through are formed in the containing grooves, and the bottom of the base is connected with an ejector block used for limiting the E-shaped magnetic core. The E-shaped magnetic core is placed in the containing groove, the middle column and the two side edges of the E-shaped magnetic core extend out of the through groove to the upper surface of the base, the inner bottom face of a cavity of the E-shaped magnetic core abuts against the top face of the containing groove, the inner bottom face of the cavity of the E-shaped magnetic core serves as a reference face, the upper surface of the E-shaped magnetic core is ground, and therefore the cavity depth meets the tolerance requirement. The top block comprises the connecting part, the abutting part is arranged on the connecting part, the abutting part is of an arc-shaped protruding structure, the top block is in line contact with the E-type magnetic core and acts on the middle position of the bottom face of the E-type magnetic core, and the inner bottom face of the cavity of the E-type magnetic core can completely abut against the top face of the containing groove.

Description

Technical Field

[0001] The utility model belongs to the technical field of soft ferrite production, and particularly relates to a grinding fixture for ferrite cores. Background Art

[0002] As an important electronic material, soft ferrite is finding increasing application. Besides traditional applications in power electronics, communications, computers, healthcare, and automotive, it is also finding applications in emerging fields such as new energy, high-speed trains, and smart homes.

[0003] With the widespread promotion of application fields, the market has higher and higher requirements for the dimensional accuracy of soft magnetic products. Conventional process mode can no longer meet the dimensional accuracy requirements of products, and precise post-processing methods must be used to meet product dimensional requirements.

[0004] A ferrite E-type core requires a cavity depth tolerance of ±0.05 mm. This tolerance is achieved through post-processing, but since grinding is not possible inside the cavity, only the top and bottom surfaces can be ground. However, the reference surface for grinding the product is the back surface, which conflicts with the required testing basis, resulting in the product's dimensions exceeding the specification after grinding.

[0005] Therefore, there is an urgent need for a grinding fixture for ferrite cores, which can use the bottom surface of the cavity of the E-shaped core as a reference surface and grind the upper plane so that the cavity depth meets the tolerance requirements. Utility Model Content

[0006] The present invention aims to provide a ferrite core grinding fixture to solve the problems mentioned in the background art. The ferrite core grinding fixture provided by the present invention has the characteristic of being able to use the bottom surface of the cavity of an E-shaped core as a reference surface to grind the upper surface so that the cavity depth meets the tolerance requirements.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a grinding fixture for a ferrite core, comprising a base, a plurality of placement grooves being provided at the bottom of the base, the placement grooves being provided with through grooves for the middle column and two side edges of the E-shaped magnetic core to pass through, and a top block being connected to the bottom of the base for limiting the E-shaped magnetic core.

[0008] In order to achieve locking of the top block and the base, the top block and the base are further locked by fixing screws.

[0009] Furthermore, three placement slots are provided, and the three placement slots are arranged at equal intervals.

[0010] Furthermore, two passing slots arranged at equal intervals are provided in a single placement slot.

[0011] In order to accommodate the top block, the bottom of the base is further provided with an accommodating groove corresponding to the placement groove.

[0012] In order to ensure that the top block and the E-shaped magnetic core are in line contact and that the bottom surface of the cavity of the E-shaped magnetic core completely contacts the top surface of the placement slot, the top block further includes a connecting portion, on which a contact portion is provided. The contact portion is an arc-shaped protrusion.

[0013] In order to facilitate drainage, a drainage groove passing through the outside of the groove is further provided on the top surface of the base.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model places the E-shaped magnetic core into the placement slot so that its center column and both sides extend from the slot to the upper surface of the base. The E-shaped magnetic core is limited by the top block so that the bottom surface of the cavity of the E-shaped magnetic core contacts the top surface of the placement slot. The top surface of the E-shaped magnetic core is ground with the bottom surface of the cavity of the E-shaped magnetic core as the reference surface, so that the cavity depth meets the tolerance requirements.

[0016] 2. The top block of the utility model includes a connecting portion, on which a resistance portion is provided. The resistance portion is an arc-shaped protruding structure, so that the top block is in line contact with the E-type magnetic core and acts on the middle position of the bottom surface of the E-type magnetic core, so that the bottom surface of the cavity of the E-type magnetic core and the top surface of the placement groove can completely resist each other, thereby solving the problem that the bottom surface of the cavity of the E-type magnetic core and the top surface of the placement groove cannot completely resist each other when the top block and the E-type magnetic core are in surface contact due to the uneven bottom surface of the cavity of the E-type magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 2 It is a structural diagram of the utility model;

[0019] Figure 3 This is a structural diagram of the base of the utility model;

[0020] Figure 4 This is a schematic structural diagram of the top block of the utility model;

[0021] Figure 5 This is a schematic structural diagram of the E-shaped magnetic core to be ground in the present invention;

[0022] In the figure: 1. fixing screw; 2. top block; 21. connecting part; 22. interference part; 3. base; 31. placement groove; 32. receiving groove; 33. passing groove; 4. drainage groove; 5. E-type magnetic core. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1-5 The utility model provides the following technical solutions: a grinding fixture for a ferrite core, comprising a base 3, the bottom of the base 3 is provided with three equally spaced placement grooves 31, the placement grooves 31 are provided with two equally spaced passing grooves 33 for the middle column and two side edges of the E-type magnetic core 5 to pass through, and the bottom of the base 3 is connected to a top block 2 for limiting the E-type magnetic core 5.

[0026] By adopting the above technical solution, the utility model places the E-type magnetic core 5 into the placement groove 31, so that its center column and both side edges extend from the through groove 33 to the upper surface of the base 3, and limits the E-type magnetic core 5 by the top block 2, so that the bottom surface of the cavity of the E-type magnetic core 5 contacts the top surface of the placement groove 31, and realizes grinding the upper surface of the E-type magnetic core 5 with the bottom surface of the cavity of the E-type magnetic core 5 as the reference plane, so that the cavity depth meets the tolerance requirements.

[0027] Specifically, the top block 2 and the base 3 are locked by fixing screws 1 .

[0028] By adopting the above technical solution, the top block 2 and the base 3 are locked.

[0029] Specifically, the bottom of the base 3 is further provided with a receiving groove 32 corresponding to the placement groove 31 .

[0030] By adopting the above technical solution, the top block 2 is accommodated.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that: specifically, the top block 2 includes a connecting portion 21, and a resisting portion 22 is provided on the connecting portion 21. The resisting portion 22 is an arc-shaped protruding structure, and the resisting portion 22 corresponds to the middle position of the bottom surface of the E-shaped magnetic core 5.

[0033] By adopting the above technical solution, the top block 2 is in line contact with the E-type magnetic core 5, acting on the middle position of the bottom surface of the E-type magnetic core 5, so that the bottom surface of the cavity of the E-type magnetic core 5 and the top surface of the placement groove 31 can completely conflict with each other, solving the problem that the bottom surface of the cavity of the E-type magnetic core 5 and the top surface of the placement groove 31 cannot completely conflict with each other when the top block 2 and the E-type magnetic core 5 are in surface contact due to the uneven bottom surface of the cavity of the E-type magnetic core 5.

[0034] Example 3

[0035] The difference between this embodiment and the first embodiment is that: specifically, a drainage groove 4 passing through the outside of the groove 33 is provided on the top surface of the base 3 .

[0036] By adopting the above technical solution, drainage is facilitated.

[0037] In summary, the present invention places the E-shaped magnetic core 5 in the placement groove 31 so that its center column and both sides extend from the through groove 33 to the upper surface of the base 3, and limits the E-shaped magnetic core 5 by the top block 2 so that the bottom surface of the cavity of the E-shaped magnetic core 5 contacts the top surface of the placement groove 31, and realizes grinding the upper surface of the E-shaped magnetic core 5 with the bottom surface of the cavity of the E-shaped magnetic core 5 as the reference surface, so that the cavity depth meets the tolerance requirements; the top block 2 of the present invention includes a connecting portion 2 1. A resisting portion 22 is provided on the connecting portion 21. The resisting portion 22 is an arc-shaped protruding structure, which makes the top block 2 and the E-type magnetic core 5 in line contact. The resisting portion 22 acts on the middle position of the bottom surface of the E-type magnetic core 5 so that the bottom surface of the cavity of the E-type magnetic core 5 and the top surface of the placement groove 31 can completely resist each other, thereby solving the problem that the bottom surface of the cavity of the E-type magnetic core 5 and the top surface of the placement groove 31 cannot completely resist each other when the top block 2 and the E-type magnetic core 5 are in surface contact due to the uneven bottom surface of the cavity of the E-type magnetic core 5.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ferrite core grinding fixture, comprising a base, characterized in that: The bottom of the base is provided with a plurality of placement slots, each of which is provided with passage slots for the middle column and two side edges of the E-shaped magnetic core to pass through. The bottom of the base is connected to a top block for limiting the E-shaped magnetic core.

2. The grinding fixture for a ferrite core according to claim 1, characterized in that: The top block and the base are locked by fixing screws.

3. The grinding fixture for a ferrite core according to claim 1, characterized in that: There are three placement slots in total, and the three placement slots are arranged at equal intervals.

4. The grinding fixture for a ferrite core according to claim 1, wherein: Two passing slots arranged at equal intervals are provided in the placement slot.

5. The grinding fixture for a ferrite core according to claim 1, characterized in that: The bottom of the base is also provided with a receiving groove corresponding to the placement groove.

6. The grinding fixture for a ferrite core according to claim 1, characterized in that: The top block comprises a connecting portion, on which a resisting portion is provided.

7. The grinding fixture for a ferrite core according to claim 6, characterized in that: The interference portion is an arc-shaped protruding structure.

8. The grinding fixture for a ferrite core according to claim 1, characterized in that: A drainage groove is provided on the top surface of the base passing through the outside of the groove.

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