CN210575512U

CN210575512U - EQ type soft magnetic ferrite magnetic core blank

Info

Publication number: CN210575512U
Application number: CN201921900083.4U
Authority: CN
Inventors: 沈永春; 陈魏魏; 王建敏; 刘铁柱
Original assignee: Shanghai Kangshun Magnetism Component Factory Co ltd
Current assignee: Shanghai Kangshun Magnetism Component Factory Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-05-19
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses an EQ type soft magnetic ferrite core blank, which comprises a bottom plate, wherein a cylindrical wrapping post is fixed in the middle of the front surface of the bottom plate, the edge positions of the front surface of the bottom plate at the two sides of the wrapping post are respectively provided with a side post, the middle of the rear surface of the bottom plate is provided with a strip-shaped groove along the direction of a central line, the central position of the rear surface of the bottom plate is also provided with a circular groove, and the circular groove is superposed with the strip-shaped groove; the four corners of the back surface of the base plate are chamfered. The utility model provides a magnetic core blank can not arouse the phenomenon that the wrapping post drops because of density inequality in sintering process, guarantee the magnetic core in the yields of suppression process, improve production efficiency, and magnetic core bottom plate edge and corner can not cut off the sticky tape.

Description

EQ type soft magnetic ferrite magnetic core blank

Technical Field

The utility model relates to a magnetic core, in particular to magnetic core blank.

Background

Magnetic cores are sintered magnetic metal oxides composed of various iron oxide mixtures, and ferrite cores are used in the prior art in coils and transformers for various electronic devices. For example, manganese zinc ferrite and nickel zinc ferrite are typical magnetic core materials, wherein manganese zinc ferrite has characteristics of high magnetic permeability and high magnetic flux density, and has characteristics of low loss at a frequency lower than 1MHz, nickel zinc ferrite has characteristics of extremely high impedance, low magnetic permeability of less than several hundred, and the like, and generates low loss at a frequency higher than 1MHz, and the like.

In the process of designing and producing the EQ2714A magnetic core, the size of the magnetic core is larger, the size of the winding post in the middle is larger than the sizes of other magnetic cores, when the front surface of the magnetic core bottom plate pressed by the full-automatic dry powder press is flat, the winding post part needs more powder in the pressing forming process due to the structure, the probability of uneven powder particles or uneven moisture between the magnetic core bottom plate and the winding post is greatly increased, and the probability of easy falling of the winding post is also increased.

In addition, when the magnetic core is applied, after the electric wire is wound, the magnetic core needs to be wrapped by an insulating tape,

the EQ magnetic core has a large volume, and after a magnetic core blank is ground to be flat, the edge and the edge are sharp, especially the corner of the rear surface of the bottom plate, when an insulating adhesive tape is wound, the adhesive tape is easily cut off by the edge, especially the corner, of the bottom plate of the magnetic core, and workers can be scratched by carelessness.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model provides a EQ type soft magnetic ferrite magnetic core blank guarantees that the phenomenon that the product warp and the wrapping post drops can not appear in the magnetic core in sintering process.

The utility model discloses a following technical scheme realizes:

the EQ type soft magnetic ferrite core blank comprises a bottom plate, wherein a cylindrical winding post is fixed in the middle of the front surface of the bottom plate, side posts are respectively arranged at the edge positions of the front surface of the bottom plate on two sides of the winding post, a strip-shaped groove is formed in the middle of the rear surface of the bottom plate along the direction of a central line, a circular groove is also formed in the center of the rear surface of the bottom plate, and the circular groove is overlapped with the strip-shaped groove; the four corners of the back surface of the base plate are chamfered.

The angle of the chamfer is 40 degrees.

The strip-shaped groove is parallel to the side column.

The edge of the rear surface of the base plate is chamfered at an angle of 40 degrees.

The length of the strip-shaped groove is equal to the width of the rear surface of the bottom plate, and two ends of the strip-shaped groove are open.

And the middle part of the side column is provided with an exhaust groove, and the central line of the exhaust groove is vertical to the central line of the strip-shaped groove.

The utility model has the advantages that:

one, the utility model provides a magnetic core blank that the suppression is good leads to the problem that the waste product produced because of the inhomogeneous powder density of suppression in sintering process, the position through the bottom plate rear surface at the magnetic core corresponds the wrapping post sets up circular recess, and the bar recess is established to the central line direction of bottom plate rear surface, make the density increase of this partial magnetic core powder on the bottom plate, guarantee the wrapping post, bottom plate and wrapping post are connected, compaction between the partial powder granule of bottom plate and limit post connection, the compaction, it is even to press, reduce the probability that this regional powder granule is inhomogeneous or the inhomogeneous situation of moisture takes place. The full-automatic dry powder press is in the pressing process, the pressure of suppression is balanced, and the magnetic core blank density that the suppression is good is even, therefore later process is in the sintering, and the magnetic core can not arouse the phenomenon that the wrapping post drops because of the density is uneven, and the yield promotes greatly.

Two, the utility model discloses all set up the chamfer to four turnings of bottom plate rear surface and edge of magnetic core blank, make bottom plate rear surface grind after leveling, sharp edge and turning can not appear, when using electronic products such as magnetic core coiling transformer, during the insulating adhesive tape of winding parcel electric wire, can not cut off.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a rear view of the present invention.

Fig. 3 is a left side view of the present invention.

Detailed Description

With reference to fig. 1 to 3, the utility model comprises a bottom plate 1, a cylindrical wrapping post 2 is fixed in the middle of the front surface of the bottom plate 1, the edge positions of the front surface of the bottom plate 1 at the two sides of the wrapping post 2 are respectively provided with a side post 3, the middle of the rear surface of the bottom plate 1 is provided with a strip-shaped groove 4 along the direction of the central line, the central position of the rear surface of the bottom plate 1 is also provided with a circular groove 5, and the circular groove 5 is partially overlapped with the strip-shaped groove 4; the four corners of the rear surface of the base plate 1 are chamfered 6.

The angle of the chamfer 6 is 40 degrees.

The strip-shaped grooves 4 are parallel to the side columns 3.

The edge of the rear surface of the base plate 1 is chamfered 7 at an angle of 40 degrees.

The length of the strip-shaped groove 4 is equal to the width of the rear surface of the bottom plate 1, and two ends of the strip-shaped groove 4 are open.

And an exhaust groove 8 is formed in the middle of the side column 3, and the central line of the exhaust groove 8 is perpendicular to the central line of the strip-shaped groove 4.

After the magnetic powder is pressed into a magnetic core blank by a full-automatic dry powder press, sintering is started, the sintered magnetic core blank is ground, and the parts of the rear surface of the bottom plate except the strip-shaped groove 4 and the circular groove 5 are ground, so that the rear surface of the bottom plate is flat, and a finished magnetic core product is obtained.

Claims

1. EQ type soft magnetic ferrite magnetic core blank, including the bottom plate, be fixed with cylindric wrapping post in bottom plate front surface middle part, the bottom plate front surface border position of wrapping post both sides is equipped with limit post, its characterized in that respectively: the middle part of the rear surface of the bottom plate is provided with a strip-shaped groove along the direction of a central line, the central position of the rear surface of the bottom plate is also provided with a circular groove, and the circular groove is overlapped with the strip-shaped groove; the four corners of the back surface of the base plate are chamfered.

2. The EQ type soft magnetic ferrite core blank according to claim 1, wherein: the angle of the chamfer is 40 degrees.

3. The EQ type soft magnetic ferrite core blank according to claim 1, wherein: the strip-shaped groove is parallel to the side column.

4. The EQ type soft magnetic ferrite core blank according to claim 1, wherein: the edge of the rear surface of the base plate is chamfered at an angle of 40 degrees.

5. The EQ type soft magnetic ferrite core blank according to claim 1, wherein: the length of the strip-shaped groove is equal to the width of the rear surface of the bottom plate, and two ends of the strip-shaped groove are open.

6. The EQ type soft magnetic ferrite core blank according to any of the claims 1 to 5, wherein: and the middle part of the side column is provided with an exhaust groove, and the central line of the exhaust groove is vertical to the central line of the strip-shaped groove.