JPS59178715A - Manufacture of wound core - Google Patents

Abstract

PURPOSE:To easily obtain a wound core which does not deform under its own weight and has sufficient rigidity by providing reinforcing members to a wound core formed by winding amorphous magnetic alloy thin belt and fixing it with an insulating tape. CONSTITUTION:A wound core 1 is formed by winding many amorphous magnetic alloy thin plates 2 around a winding core 3 including reinforcing members 4. The metal bands 7 are respectively caused to pass through the cut-away portions 5 of the winding core 3. Under this condition, the heat processing is executed to the wound core 1 in order to eliminate distortion and the winding core 3 is removed from the window portion by dividing it. Thereafter, an insulating tape 8 is wound around the yokes of wound core 1 and the reinforcing members 4 attached thereto and the bands 7 being wound are removed, thus completing a wound core 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a wound core using an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

Recently, winding cores installed in inductors such as transformers are being developed that are made of amorphous magnetic alloy thin strips with excellent magnetic properties, instead of the conventional silicon steel strips. .

Amorphous magnetic alloy ribbon is produced by cooling a molten magnetic alloy consisting of metals such as iron and cobalt, boron, carbon, and silica using an ultra-quenching method, and its thickness is approximately 30 μm. It is thin, about one-tenth the thickness of a silicon steel strip. For this reason, the mechanical strength of the amorphous magnetic alloy ribbon itself is low, and when a wound core is manufactured by fully winding the amorphous magnetic alloy ribbon, there is a problem that the core lacks mechanical strength, that is, rigidity. As the core size increases, insufficient mechanical strength becomes a major problem.

When manufacturing a wound core, the amorphous magnetic alloy ribbon 2 is wound around a plurality of wound cores 3 combined as shown in FIG. 1 to form a wound core 1. After the iron core 1 is heat treated to remove distortion, each wound core 3 is removed from the wound iron core 1 to manufacture the iron core. However, when the winding core 3 is removed from the winding core 1, the thickness of the amorphous magnetic alloy ribbon 2 is small and the rigidity is insufficient, as shown in FIG. The upper net iron part cannot support its own weight, that is, the weight of the laminated thin strips 2, and is deformed. For this reason, when the wound core is assembled into a transformer together with the winding, handling of the core becomes extremely difficult.

Therefore, it is possible to correct the deformation of the core and attach reinforcing members to the core after removing the core.
The work of straightening a wound core once deformed to its original shape is time-consuming and does not degrade the magnetic properties of the core, and it is also difficult to attach all reinforcing members while maintaining the core in its original shape. It's a hassle.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a wound core made by winding an amorphous magnetic alloy ribbon with sufficient rigidity to compensate for the lack of strength of the ribbon and prevent deformation. The present invention provides a method for manufacturing a wound core, which makes it easy to handle the core after completion, eliminates the need for straightening the core, simplifies the work, and prevents deterioration of the core's magnetic properties. be.

[Summary of the invention]

The method for manufacturing a wound core of the present invention includes arranging a reinforcing member having a portion that comes into contact with at least one corner on the window side of the wound core on a side part of the wound core, and the winding core including this reinforcing member. The wound core is completely formed by winding an amorphous magnetic alloy ribbon around the wound core, and then the wound core is heat-treated, and then the wound core is removed from the wound iron core, and the valley reinforcing member and this reinforcing member are removed. The entire feature is that an insulating tube is wrapped around the portion of the wound core where it is located.

That is, by reinforcing the wound amorphous magnetic alloy ribbon with a reinforcing member fixed with an insulating tube, it is possible to manufacture a whole wound core that does not deform due to its own weight after completion and has sufficient strength to withstand handling. Moreover, the reinforcing member has a portion that abuts the window-side corner of the core, so that the core can be reliably reinforced while being small.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to drawings.

An embodiment of the method for manufacturing a wound core of the present invention will be described with reference to FIGS. 3 to 6.

First, as shown in FIG. 3, a plurality of divisible winding cores 3 are combined and prepared, and reinforcing members 4 are respectively arranged on each side of a pair of opposing sides of the combined winding core 3. Each side of the winding core 3 on which the reinforcing member 4 is arranged is a portion facing the window side of the upper mesh iron portion and the lower mesh iron portion of the winding core. The reinforcing member 4 has a bridge shape, and has two corners 4m and 4h that abut against both corners on the window side of each yoke of the wound core.
It has f. The reinforcing member 4 is made of metal that can withstand the heat treatment of the wound core. Further, notches 5 are formed on both sides of the winding core 3, and have a gap slightly longer than the reinforcing member 4.

Next, as shown in FIG. 4, the amorphous magnetic alloy ribbon 2 is wound many times around the outer circumference of the wound core 3 including each reinforcing member 4 to form the wound core 1. In this case, the amorphous magnetic alloy ribbon 2
can be easily wound while being guided by the bridge-shaped reinforcing member 4. The corner portions 4a, 4a of the reinforcing member 4 abut on each corner portion of each yoke portion of the formed wound core 1 on the window portion side. Further, as shown in FIG. 6, the reinforcing member 4 has at least one corner 4a in contact with the wound core 1 with an insulator 6 interposed therebetween.

Next, as shown in FIG. 4, reinforcing members 4 are placed separately on the outside of each yoke portion of the wound core 1.

Each corner 4a, 4a of this reinforcing member 4 abuts on both outer corners of each yoke of the wound core 1. Further, as shown in FIG. 6, this reinforcing member 4 has at least one corner portion in contact with the wound core 1 via an insulator 6. Furthermore, as shown in FIG. 4, each metal band 7 is passed through each notch 5 of the winding core 3, and the metal band 7 is inserted into each yoke part of the winding core l and each reinforcing member 4 arranged at the yoke part. , 4 around the outside.

Next, in this state, the wound core 1 is subjected to heat treatment to remove distortion. In this case, since the wound core 1 is reinforced by the reinforcing members 4, 4 fixed by the metal band 7, handling is easy.

Next, each winding core 3 is removed from the central part of the winding core l, that is, from the window part.
Separate and remove 9. Then, as shown in FIGS. 5 and 6, insulating tubes 8 are respectively wound around the outer circumferences of reinforcing members 4.degree. 4 disposed at the yoke portions of the wound core 1.

After that, remove the metal band z that was wrapped around it.

In this way, the wound core If is completed in the state shown in FIG. FIG. 6 shows a cross section of the yoke portion of the completed wound core 1.

Thus, the wound core 1 manufactured in this way has a layered amorphous magnetic alloy ribbon 2 wound at each yoke portion.
A gutter-shaped reinforcing member 4.4' that has corner portions abutting the corners on the inside and outside of the ! ! - By arranging the winding core 3 and fixing it with the insulating tees 7''8, it is possible to provide sufficient rigidity so that it will not be deformed by its own weight even when the winding core 3 is removed. Since it has a corner part that comes into contact with and presses the corner part of the iron core l, the wound core can be effectively reinforced without increasing its wall thickness.For this reason, the 11h strong member 4 can be made small and It is possible to suppress an increase in the outer dimensions of the core due to the provision of the reinforcing member 4. Since the reinforcing member 4 is in contact with the wound core 1 via the insulator 6, short-circuiting of the core due to the reinforcing member 4 is prevented and the wound core 1
The increase in eddy current loss can be prevented.

The reinforcing members placed on the core in the process of manufacturing the wound core are not limited to the embodiments described above. The reinforcing member may have a corner that abuts at least one corner of the winding core on the window side. In order to increase the rigidity of the wound core 1, it is most preferable to arrange the reinforcing members on the inside and outside of the wound core 1 so that they come into contact with both corners. However, the present invention is not limited to this. Alternatively, it may be placed on either side of the inside.

FIGS. 7 to 11 each show other different embodiments of the reinforcing member. FIG. 7 shows a structure in which a reinforcing member 9 having a U-shaped cross section larger than the reinforcing member 4 is arranged inside the wound core 1, and a reinforcing plate 10 is arranged outside.

Figure 8 shows a wound core 1 whose cross section is stepped, and a reinforcing member 1 whose cross section follows the core cross sectional shape.
No.

Figure 9 shows two reinforcing members 12.12f that have a cross-sectional shape.
These are provided at corners on the line of symmetry on the outside and inside of the wound core 1.

Figure 10 shows two reinforcing members 13.13 with an L-shaped cross section.
They are provided, for example, at both inner corners of the f-volume core 1.

FIG. 11 shows a structure in which a reinforcing member 14 having a U-shaped cross section and a flange portion 14a is provided inside the wound core 1, and a reinforcing member 15 having a U-shaped cross section is provided on the outside, and the flange portion of the reinforcing member 14 is used for fixing the core. (not shown).

Note that the reinforcing member may be provided not only at the yoke portion of the wound core 1 but also at the leg portion, or may be provided only at one of the legs.

〔Effect of the invention〕

As explained above, the method for manufacturing the wound core of the present invention is such that the reinforcing member is placed on the wound core around which the amorphous magnetic alloy ribbon is wound at the core manufacturing stage and fixed with an insulating tube. A wound core having sufficient rigidity that will not deform under its own weight at the completion stage can be easily obtained. Therefore, the obtained wound cup core is not only easy to handle and can be easily incorporated into transformers, etc., but also requires the troublesome work of correcting deformation of the wound core made of amorphous magnetic alloy ribbon after the core is completed. This eliminates the need for deterioration of the core magnetic properties due to this straightening work. Furthermore, a small reinforcing member can be used.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the production of a conventional wound core, FIG. 2 is an explanatory diagram showing a conventional wound core, and FIGS. 3 and 4 each illustrate the manufacturing process in an embodiment of the manufacturing method of the present invention. 5 is a front view showing the wound core manufactured according to the same example, FIG. 6 is a cross-sectional view of the same wound core, and FIGS. 7 to 1.
FIG. 1 shows other embodiments of reinforcing members that are different from each other, and is a sectional view of a state in which these reinforcing members are arranged on a wound core. 1... Wound iron core, 2... Amorphous magnetic alloy ribbon, 3...
- Winding core, 4... Reinforcing member, 6... Insulator, 7...
・Metal band, 8...Insulating tape, 9.11-15・
...Reinforcement member. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Prisoner H4 Figure Veri 3 Figure 5 Figure 6 Figure 7 Figure 9 Ward'. Ward?

Claims (2)

[Claims] (1) In a method for manufacturing a wound core formed by winding an amorphous magnetic alloy ribbon, the side of the wound core is reinforced with a corner portion that abuts at least one corner on the window side of the wound core. The members are arranged, and an amorphous magnetic alloy ribbon is wound around the core including the reinforcing member to form a wound core, and then the wound core is heat-treated, and then the wound core is wrapped around the wound core. A method for manufacturing a wound core, comprising: removing the core, and wrapping an insulating tape around the reinforcing member and the portion of the wound core where the reinforcing member is located. (2) The method for manufacturing a wound core according to claim 1, wherein the reinforcing member is brought into contact with the core through an insulator.