JP2584155B2 - Manufacturing method of amorphous wound iron core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an amorphous wound iron core formed by winding a foil strip of an amorphous magnetic material used for a power distribution transformer.

[0002]

2. Description of the Related Art In recent years, amorphous magnetic materials have been studied as magnetic core materials for transformers and the like.

Conventionally, the thickness of a foil strip used for an amorphous wound iron core is about 25 μm, and has a low iron loss and excellent magnetic properties. This is annealed because of the presence of internal strain due to ultra-rapid cooling. Hereinafter, a method of manufacturing an amorphous wound iron core will be described with reference to FIG. As shown in the figure, a foil strip 1 of an amorphous magnetic material is wound around a winding core 2 in FIG. In (b), after the core 2 is removed, the core 2 is fastened with the fastening fitting 4. In (c), after the wound body 3 is cut, the adhesive 5 is applied to one or both sides of the cut surface and cured. In (d), about 4 to 6 laminated blocks 6 each composed of several foil strips 1 are laminated in a ring shape as one aggregate, and then formed into a final core shape to form a magnetic core 7.
Get. FIG. 4 shows a state in which the adhesive 8 is applied to the butted portions of the laminate blocks 6, and a gap 9 is formed between the laminate blocks 6.

[0004]

However, in the above-mentioned conventional manufacturing method, the magnetic core 7 is annealed after being formed into the final core shape, but the adhesives 8 are re-adhered to each other by the annealing. In addition, the adhesive 8 and the foil strip 1 are re-adhered to each other, and the workability of disassembling the laminated block 6 after annealing is poor.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems.
An object of the present invention is to provide a method for manufacturing an amorphous wound iron core that can improve the workability of decomposition without re-adhesion of an adhesive.

[0006]

In order to achieve the above object, the present invention provides a step of winding and laminating a foil strip of an amorphous magnetic material, and a step of cutting a roll of the foil strip in a width direction. Applying an adhesive to a cut surface generated by the cutting step, and then fixing the foil strips to each other; separating a plurality of the foil strips as a single-layer laminate block; Annealing a magnetic core formed into a final shape by laminating blocks in a ring shape using the block as a minimum unit.
This is a production method in which after separating the laminate block, heat-resistant fine particles are attached to the surface of the adhesive and the periphery thereof.

[0007]

In the above construction, after the laminate block is separated, heat-resistant fine particles are adhered to the surface of the adhesive and the periphery thereof, so that the adhesive does not adhere again.

[0008]

An embodiment of the present invention will be described below with reference to FIG. In this embodiment, the same components as those shown in the above-described conventional example are denoted by the same reference numerals, and the description thereof will be omitted. The characteristic configuration of this embodiment is that heat-resistant fine particles are attached to the surface of the adhesive in the laminate block portion of the foil strip and the periphery thereof described in the conventional example. That is, the composition of the adhesive 8 applied to the end of the laminated block 6 may be silicone resin, heat-resistant epoxy resin,
Uses heat-resistant polyester resin. The viscosity of the adhesive 8 when applied is preferably 100 poise or less,
If the viscosity is higher than that, it is difficult to penetrate between the foil strips 1. The hardness of the adhesive 8 after curing is 50 or more (JIS-
A). The fine particles 10 to be adhered to the surface of the adhesive 8 and the periphery thereof are made of a heat-resistant material such as alumina, silica, magnesium, titanium oxide, etc., and the average particle diameter is suitably 10 μm or less, and especially 1 μm or less is most preferable. And alumina is an excellent material.

Since the fine particles 10 are adhered to the adhesive 8 applied to the end face of the laminated block 6 as described above, re-adhesion between the laminated blocks 6 can be prevented.

FIG. 2 shows another embodiment of the present invention, in which an assembly 11 in which the laminate blocks 6 are separated from each other after being separated from each other by a predetermined distance in the circumferential direction is defined as one unit, and at least an end face of the assembly 11 is separated. The heat-resistant fine particles 1 are provided on the surface of the adhesive 8 and on the periphery thereof in contact with the other end and another assembly 11.
0 is attached. According to this manufacturing method, it is suitable when the winding operation is performed on the aggregate 11 of the stacked body blocks 6, and re-adhesion between the aggregates 11 can be prevented.

[0011]

As is apparent from the above embodiment, the method for manufacturing an amorphous wound iron core according to the present invention comprises the steps of winding and laminating a foil strip of an amorphous magnetic material, and winding the foil strip in the width direction. A cutting step of cutting, a step of applying an adhesive to a cut surface generated by the cutting step, and a step of fixing the foil strips to each other; and a step of separating a plurality of the foil strips as one block of a laminate block. A step of annealing the magnetic core formed in a ring shape by laminating the laminate block as a minimum unit and annealing the magnetic core in a final shape. Heat-resistant fine particles are adhered to the surface and the periphery thereof, and by this manufacturing method, in the disassembling operation of the laminated block after annealing,
The workability of decomposition can be improved without the adhesive being re-adhered.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a laminate block according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a laminate block according to another embodiment.

FIG. 3 is a process diagram showing a conventional method for manufacturing an amorphous wound iron core.

FIG. 4 is a sectional view of a main part of a conventional laminated block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foil strip 3 Winding body 6 Laminated block 7 Magnetic core 8 Adhesive 10 Fine particles

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiromitsu Hara 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (2)

(57) [Claims] 1. A step of winding and laminating a foil strip of an amorphous magnetic material, a cutting step of cutting a roll of the foil strip in a width direction, and applying an adhesive to a cut surface generated by the cutting step. After that, a step of fixing the foil strips to each other, a step of separating a plurality of the foil strips as one block of a laminate block, and a step of laminating the laminate block in a minimum unit to form a final shape. Annealing the formed magnetic core.
A method of manufacturing an amorphous wound iron core, comprising separating heat-resistant fine particles on and around the surface of the adhesive after separating the laminate block. 2. A step of winding and laminating a foil strip of an amorphous magnetic material, a cutting step of cutting a roll of the foil strip in a width direction, and applying an adhesive to a cut surface generated by the cutting step. After that, a step of fixing the foil strips to each other, a step of separating a plurality of the foil strips as one block of a laminate block, and a step of laminating the laminate block in a minimum unit to form a final shape. Annealing the formed magnetic core.
After separating the laminate blocks, an aggregate in which they are displaced from each other by a predetermined distance in the circumferential direction is defined as one unit, and at least the other end and the other aggregate at the adhesive surface at the end of the aggregate and in the vicinity thereof A method for manufacturing an amorphous wound core in which heat-resistant fine particles are attached to a contacting portion.