阅读说明：本技术 磁力线聚磁矫正装置 (Magnetic force line magnetic gathering correction device ) 是由 王朝辉 高岗 王巍 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种磁力线聚磁矫正装置,应用于铁基或鈷基纳米晶磁芯的磁力线矫正；包括用于提供磁场的磁场装置、管状的加热炉、固定架、两块第一聚磁板、两块第二聚磁板和至少一个用于矫正磁力线的矫正单元；所述固定架为条形,所述固定架设在加热炉内,所述固定架的长度方向沿加热炉的长度方向设置,两第一聚磁板分别设在加热炉的两端口处,两第二聚磁板分别设在固定架的两端,所述第一聚磁板和第二聚磁板平行且相对,所述第一聚磁板的面积大于第二聚磁板的面积,所述矫正单元设在固定架内。本发明应用于磁芯技术领域。(The invention discloses a magnetic force line gathering and correcting device which is applied to the correction of magnetic force lines of an iron-based or cobalt-based nanocrystalline magnetic core; the device comprises a magnetic field device for providing a magnetic field, a tubular heating furnace, a fixed frame, two first magnetic gathering plates, two second magnetic gathering plates and at least one correction unit for correcting magnetic force lines; the fixing frame is in a strip shape and is arranged in the heating furnace, the length direction of the fixing frame is arranged along the length direction of the heating furnace, the two first magnetism gathering plates are respectively arranged at two ports of the heating furnace, the two second magnetism gathering plates are respectively arranged at two ends of the fixing frame, the first magnetism gathering plates and the second magnetism gathering plates are parallel and opposite, the area of the first magnetism gathering plates is larger than that of the second magnetism gathering plates, and the correcting unit is arranged in the fixing frame. The invention is applied to the technical field of magnetic cores.)

1. A magnetic force line gathering and correcting device is characterized by being applied to magnetic force line correction of an iron-based or cobalt-based nanocrystalline magnetic core;

the device comprises a magnetic field device for providing a magnetic field, a tubular heating furnace, a fixed frame, two first magnetic gathering plates, two second magnetic gathering plates and at least one correction unit for correcting magnetic force lines;

the fixing frame is in a strip shape and is arranged in the heating furnace, the length direction of the fixing frame is arranged along the length direction of the heating furnace, the two first magnetism gathering plates are respectively arranged at two ports of the heating furnace, the two second magnetism gathering plates are respectively arranged at two ends of the fixing frame, the first magnetism gathering plates and the second magnetism gathering plates are parallel and opposite, the area of the first magnetism gathering plates is larger than that of the second magnetism gathering plates, and the correcting unit is arranged in the fixing frame.

2. The magnetic force line concentrating and correcting device according to claim 1, wherein the area ratio of the calibers of the first concentrating magnetic plate and the heating furnace is 92-98%, the area ratio of the second concentrating magnetic plate and the first concentrating magnetic plate is 90-95%, and the area ratio of the cross section of the second concentrating magnetic plate and the fixed frame is 110-100%.

3. The magnetic force line magnetism-gathering correction device as claimed in claim 1, wherein at least one third magnetism-gathering plate is further disposed between the first magnetism-gathering plate and the second magnetism-gathering plate, the third magnetism-gathering plate is parallel to and opposite to the first magnetism-gathering plate and the second magnetism-gathering plate, and the area of the third magnetism-gathering plate is smaller than that of the first magnetism-gathering plate and larger than that of the second magnetism-gathering plate;

when the third magnetic gathering plate is a plurality of, the area of the third magnetic gathering plate is gradually decreased along the direction from the first magnetic gathering plate to the second magnetic gathering plate.

4. The magnetic force line magnetism gathering and correcting device of claim 3, wherein the first magnetism gathering plate, the second magnetism gathering plate and the third magnetism gathering plate are made of any one of iron, cobalt and nickel.

5. The magnetic force line concentrating and correcting device according to claim 4, wherein the first concentrating magnetic plate, the second concentrating magnetic plate and the third concentrating magnetic plate are made of DT4 pure iron respectively.

6. The magnetic force line concentrating and correcting device of claim 3, wherein the first magnetic concentrating plate, the second magnetic concentrating plate and the third magnetic concentrating plate have a thickness of 5mm to 10mm respectively.

7. The magnetic force line concentrating and correcting device of claim 3, wherein the heating furnace is in a shape of a circular tube, and the cross sections of the first concentrating magnetic plate, the second concentrating magnetic plate and the fixing frame are respectively circular.

8. The magnetic force line concentrating and correcting device according to any one of claims 1 to 7, wherein the correcting unit comprises at least two iron correcting pieces, the shape of the correcting pieces is the same as that of the magnetic core to be corrected, and the thickness of the correcting pieces is 20mm to 30 mm.

9. The magnetic force line magnetic gathering correction device as claimed in claim 8, wherein the correction unit further comprises a non-magnetic fixing rod, the correction member and the magnetic core to be corrected are both annular, and the correction member and the magnetic core to be corrected are sleeved on the fixing rod.

10. The magnetic force line concentrating and correcting device of claim 8, wherein the number of the correcting elements is two, and the correcting elements are made of DT4 pure iron.

Technical Field

The invention relates to the technical field of magnetic cores, in particular to a magnetic force line magnetism gathering and correcting device.

Background

When the iron-based or cobalt-based nanocrystalline magnetic core is magnetized by a magnetic field in the same direction, when magnetic domains of the magnetic core are arranged in parallel, a magnetic hysteresis loop of the magnetic core tends to be flattened, and the magnetic characteristic parameters of the magnetic core have the advantages of small residual magnetism Br, small coercive force Hc, low magnetic loss Ps and the like.

In view of the above requirements, it is necessary to correct an iron-based or cobalt-based nanocrystalline magnetic core, and the magnetic lines of force of the magnetic field are arc-shaped, and if the magnetic core is directly corrected, the magnetic domains of the magnetic core cannot be corrected to be parallel.

Disclosure of Invention

Technical problem to be solved

A magnetic force line magnetic gathering and correcting device solves the technical problem that the magnetic domain of an iron-based or cobalt-based nanocrystalline magnetic core cannot be corrected to be parallel.

(II) technical scheme

In order to solve the technical problem, the invention provides a magnetic force line gathering and correcting device which is applied to the magnetic force line correction of an iron-based or cobalt-based nanocrystalline magnetic core;

the device comprises a magnetic field device for providing a magnetic field, a tubular heating furnace, a fixed frame, two first magnetic gathering plates, two second magnetic gathering plates and at least one correction unit for correcting magnetic force lines;

the fixing frame is in a strip shape and is arranged in the heating furnace, the length direction of the fixing frame is arranged along the length direction of the heating furnace, the two first magnetism gathering plates are respectively arranged at two ports of the heating furnace, the two second magnetism gathering plates are respectively arranged at two ends of the fixing frame, the first magnetism gathering plates and the second magnetism gathering plates are parallel and opposite, the area of the first magnetism gathering plates is larger than that of the second magnetism gathering plates, and the correcting unit is arranged in the fixing frame.

In a further improvement, the aperture area ratio of the first magnetism gathering plate to the heating furnace is 92% -98%, the area ratio of the second magnetism gathering plate to the first magnetism gathering plate is 90% -95%, and the area ratio of the second magnetism gathering plate to the cross section of the fixing frame is 110% -100%.

In a further improvement, at least one third magnetic gathering plate is arranged between the first magnetic gathering plate and the second magnetic gathering plate, the third magnetic gathering plate is parallel and opposite to the first magnetic gathering plate and the second magnetic gathering plate, and the area of the third magnetic gathering plate is smaller than that of the first magnetic gathering plate and larger than that of the second magnetic gathering plate;

when the third magnetic gathering plate is a plurality of, the area of the third magnetic gathering plate is gradually decreased along the direction from the first magnetic gathering plate to the second magnetic gathering plate.

In a further improvement, the first magnetic gathering plate, the second magnetic gathering plate and the third magnetic gathering plate are made of any one of iron, cobalt and nickel.

In a further improvement, the first magnetic gathering plate, the second magnetic gathering plate and the third magnetic gathering plate are made of DT4 pure iron respectively.

In a further improvement, the first magnetism gathering plate, the second magnetism gathering plate and the third magnetism gathering plate are respectively 5-10 mm thick.

In a further improvement, the heating furnace is in a shape of a round pipe, and the cross sections of the first magnetism gathering plate, the second magnetism gathering plate and the fixing frame are respectively in a round shape.

In a further improvement, the correcting unit comprises at least two iron correcting pieces, the shape of the correcting pieces is the same as that of the magnetic core to be corrected, and the thickness of the correcting pieces is 20-30 mm.

Further improved, the correction unit further comprises a nonmagnetic fixing rod, the correction piece and the magnetic core to be corrected are both annular, and the correction piece and the magnetic core to be corrected are sleeved on the fixing rod.

In a further improvement, the number of the correction pieces is two, and the correction pieces are made of DT4 pure iron.

(III) advantageous effects

The magnetic force line magnetism gathering and correcting device can correct an iron-based or cobalt-based nanocrystalline magnetic core, can correct magnetic domains of the magnetic core to be parallel, and is simple to operate, high in correcting efficiency and low in correcting cost. The first magnetism-gathering plate is used for primarily collecting and gathering magnetic lines generated by the coil into the heating furnace, and the second magnetism-gathering plate is used for gathering the magnetic lines of the first magnetism-gathering plate. For example, the density of magnetic lines generated by the coil is B0, after the magnetic lines are collected and gathered by the first magnetism gathering plate, the area of the first magnetism gathering plate is slightly smaller than or equal to the caliber of the heating furnace because the first magnetism gathering plate is placed in the heating furnace, the density of the magnetic lines from the first magnetism gathering plate is B1, the density of the magnetic lines from the second magnetism gathering plate is B2, and B2 is greater than B1 and B0. Thereby, the density of the magnetic lines of force applied to the correction unit and the magnetic core is increased, and the magnetic field strength H is increased. Provides stronger magnetic field for the magnetic core needing magnetization, and further improves the magnetic characteristic parameters of the magnetic core. The magnetic domains of the magnetic core are more parallel through the magnetic gathering action of the first magnetic gathering plate and the second magnetic gathering plate.

Drawings

FIG. 1 is a schematic structural diagram of a magnetic field line concentrating correction device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a calibration unit according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating the distribution of magnetic domains of a magnetic core to be corrected before magnetization correction according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating magnetic domain distribution after magnetic core magnetization correction according to an embodiment of the present invention;

FIG. 5 is a magnetic hysteresis loop of a magnetic core before magnetization correction according to an embodiment of the present invention

FIG. 6 is a diagram illustrating a magnetization curve of a magnetic core after magnetization correction according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, a magnetic force line focusing correction device is applied to magnetic force line focusing correction of an iron-based or cobalt-based nanocrystalline magnetic core, and comprises a magnetic field device for providing a magnetic field, a tubular heating furnace 1, a fixed frame 2, two first magnetic focusing plates 3, two second magnetic focusing plates 4 and at least one correction unit 5 for correcting magnetic force lines;

the utility model discloses a heating furnace, including mount 2, heating furnace 1, mount 2, two first magnetism gathering plates 3, two second magnetism gathering plates 4, two first magnetism gathering plates 3 and two second magnetism gathering plates 4 are established respectively at the both ends of mount 2, first magnetism gathering plates 3 and second magnetism gathering plates 4 are parallel and relative, first magnetism gathering plates 3's area is greater than the area of second magnetism gathering plates 4, correction unit 5 is established in mount 2.

The correction method of the magnetic force line convergence correction device adopting the embodiment comprises the following steps: placing the magnetic core 6 to be corrected in the correcting unit 5, heating the heating furnace 1 to 450-570 ℃ to fully heat the magnetic core 6 to be corrected, and preserving heat; and applying a magnetic field to the magnetic core 6 by using the coil 8, enabling the magnetic force lines 81 generated by the coil 8 to sequentially penetrate from the first magnetism gathering plate 3, the second magnetism gathering plate 4 and the correction unit 5 at the two ends of the heating furnace 1 to the magnetic core 6, correcting the magnetic core 6 by matching the magnetism gathering plate 3 and the second magnetism gathering plate 4 with the correction unit 5, correcting the magnetic domain 61 in the magnetic core 6 to be parallel, and reducing the temperature in the heating furnace 1 to be below 350 ℃ after the correction is finished, so that the magnetic domain 2 in the magnetic core 2 tends to be stable.

The magnetic force line gathers magnetism orthotic devices of this embodiment can correct iron base or cobalt base nanocrystalline magnetic core 6, and can correct magnetic domain 21 of magnetic core 2 to being parallel, easy operation, and it is efficient to correct, corrects with low costs. The first magnetism-gathering plate 3 is used for primarily collecting and gathering the magnetic force lines generated by the coil 8 into the heating furnace 1, and the second magnetism-gathering plate 4 is used for gathering the magnetic force lines 81 of the first magnetism-gathering plate 3. For example, the density of the magnetic lines 81 generated by the coil 8 is B0, after the magnetic lines are collected and concentrated by the first magnetic concentrating plate 3, because the first magnetic concentrating plate 3 is placed in the heating furnace 1, the area of the first magnetic concentrating plate 3 is slightly smaller than or equal to the caliber of the heating furnace 1, the density of the magnetic lines 81 from the first magnetic concentrating plate 3 is B1, and the density of the magnetic lines 81 from the second magnetic concentrating plate 4 is B2, there are B2 > B1 > B0. Thereby, the density of the magnetic lines of force applied to the correcting unit 5 and the magnetic core 6 is increased, and the magnetic field strength H is increased. A stronger magnetic field is provided for the magnetic core 6 which needs to be magnetized, and the magnetic characteristic parameters of the magnetic core 6 are further improved. The magnetic domains 61 of the magnetic core 6 are more parallel by the magnetic convergence action of the first magnetic convergence plate 3 and the second magnetic convergence plate 4.

Specifically, the method for determining whether the correction of the magnetic core 6 is completed is as follows: and testing the magnetic core 6 close to the correcting piece 51, testing the magnetic parameters, the magnetic conductivity, the hysteresis loop and other data, and if the magnetic core 6 close to the correcting piece 51 is judged to be corrected, finishing the correction of all the magnetic cores 6.

It should be noted that, if the first magnetic convergence plate 3 and the second magnetic convergence plate 4 are not provided, the correction unit 5 can correct the magnetic core 6, but the correction effect is not so good, and the purpose of magnetic convergence is to converge the large-area discrete magnetic force lines 81. The areas of the first magnetism collecting plate 3 and the second magnetism collecting plate 4 are reduced in a stepwise manner. Thus, the density of the magnetic lines of force 81 is increased, and the magnetic flux density is increased, and the larger the magnetic field intensity applied to the core 6 is, the larger the effect on the parallel alignment of the magnetic domains 61 of the core 6 is.

In the present embodiment, the magnetic field may be applied by other magnetic field means, and is not limited to the coil 8.

Further, in an embodiment, the area ratio of the calibers of the first magnetism collecting plate 3 and the heating furnace 1 is 92% to 98%, the area ratio of the second magnetism collecting plate 4 and the first magnetism collecting plate 3 is 90% to 95%, and the area ratio of the cross section of the second magnetism collecting plate 4 and the cross section of the fixing frame 2 is 110% to 100%. Specifically, the area of the first magnetism collecting plate 3 is 95% of the caliber of the heating furnace 1, the first magnetism collecting plate 3 is placed in the port of the heating furnace 1, and the area of the second magnetism collecting plate 4 is 80% of the area of the first magnetism collecting plate 3. Under the area ratio, the quantity of the magnetic cores 6 in the correction process is ensured, and the magnetic gathering effect is also met. Specifically, the fixing frame 2 may be a circular or cylindrical shape, and a plurality of correction units 5 may be placed in the fixing frame 2, which facilitates mass production. Assuming that the magnetic force line 81 generated by the coil 8 is 1T, the magnetic force line 81 from the first magnetic convergence plate 3 is 1/0.95 at B1, and is 1.05T, and the magnetic force line 81 from the second magnetic convergence plate 4 is 1/0.8 at B2, and is 1.25T. That is, the magnetic flux density B2 applied to the correcting unit 5 and the magnetic core 6 is increased by 1.25 times by the action of the first magnetic convergence plate 3 and the second magnetic convergence plate 4.

Further, in an embodiment, at least one third magnetic gathering plate is further disposed between the first magnetic gathering plate 3 and the second magnetic gathering plate 4, the third magnetic gathering plate is parallel to and opposite to the first magnetic gathering plate 3 and the second magnetic gathering plate 4, and the area of the third magnetic gathering plate is smaller than that of the first magnetic gathering plate 3 and larger than that of the second magnetic gathering plate 4;

when the third magnetic gathering plate is a plurality of, the area of the third magnetic gathering plate is decreased gradually along the direction from the first magnetic gathering plate 3 to the second magnetic gathering plate 4. And a third gradient magnetic plate can be arranged according to actual requirements.

Further, in an embodiment, the first magnetic gathering plate 3, the second magnetic gathering plate 4, and the third magnetic gathering plate are made of any one of iron, cobalt, and nickel, respectively, and since cobalt and nickel are relatively expensive, it is preferable that the first magnetic gathering plate 3, the second magnetic gathering plate 4, and the third magnetic gathering plate are made of iron.

Further, in an embodiment, the first magnetic gathering plate 3, the second magnetic gathering plate 4, and the third magnetic gathering plate are made of DT4 pure iron, and DT4 pure iron is cheap and has a good magnetic gathering effect.

Further, in an embodiment, the first magnetic gathering plate 3, the second magnetic gathering plate 4 and the third magnetic gathering plate have a thickness of 5mm to 10mm, and preferably, the first magnetic gathering plate 3, the second magnetic gathering plate 4 and the third magnetic gathering plate have a thickness of 5 mm.

Further, in an embodiment, the heating furnace 1 is in a shape of a circular tube, and the cross sections of the first magnetic gathering plate 3, the second magnetic gathering plate 4 and the fixing frame 2 are respectively circular.

Further, in an embodiment, the correcting unit 5 includes at least two iron correcting elements 51, the shape of the correcting elements 51 is the same as the shape of the magnetic core to be corrected, the thickness of the correcting elements 51 is 20mm to 30mm, when the thickness of the correcting elements 51 is 20mm, the correcting effect is the best, the material utilization rate of the correcting elements 51 is the highest, the cost performance is the best, and the economy is the best. The correction method of the correction unit 5 comprises the following steps: by forming the iron correcting member 51 into the same shape as the magnetic core 6 to be corrected, when correcting, each magnetic core 6 to be corrected is placed between the correcting members 51, the magnetic force lines 81 pass through the correcting members 51 and the magnetic core 6 to be corrected in sequence after passing through the second magnetic focusing plate 4, the magnetic force lines 81 passing through the magnetic core 6 can be made to be parallel, and when correcting the magnetic core 6, the magnetic domains 61 in the magnetic core 6 can be made to be parallel.

Can place a plurality of correction units 5 in the mount 2, can put a plurality ofly between every correction unit 5's the correction piece 51 and treat and correct magnetic core 6, like this, can correct magnetic core 6 to treating to correct a lot of simultaneously, can realize that the batchization is corrected, correct efficiently. As shown in fig. 3 to 4, the magnetic domains 61 of the magnetic core 6 before being corrected are disordered, and the magnetic domains 6 in the magnetic core 6 tend to be parallel after being corrected by the correction method for the magnetic lines 81 of the iron-based or cobalt-based nanocrystalline magnetic core of the present embodiment.

Further, in an embodiment, the correcting unit 5 further includes a non-magnetic fixing rod 52, the correcting member 51 and the magnetic core to be corrected are both annular, and the correcting member 51 and the magnetic core to be corrected are sleeved on the fixing rod 52. Preferably, the correcting element 51 and the magnetic core 6 to be corrected are circular rings, and the fixing rod 52 is a round rod.

Further, in an embodiment, the number of the correcting elements 51 is two, and in a specific correcting process, only two correcting elements 51 are needed, and if more than two correcting elements 51 are provided, the core 2 to be corrected can be corrected, but unnecessary waste is also caused. The correcting element 51 is made of DT4 pure iron, and the first magnetic gathering plate 3, the second magnetic gathering plate 4, the third magnetic gathering plate and the correcting element 51 of the embodiment can all be made of DT4 pure iron, but the first magnetic gathering plate 3, the second magnetic gathering plate 4 and the third magnetic gathering plate have the function of gathering magnetism, and the correcting element 51 has the function of correcting. The function of the correction piece 51 is different from that of the first magnetism gathering plate 3, the second magnetism gathering plate 4 and the third magnetism gathering plate in the thickness range.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.