JPS59210629A - Manufacture of amorphous core - Google Patents

Abstract

PURPOSE:To check deterioration according to processing of the magnetic characteristic of an amorphous core by a method wherein an amorphous magnetic thin belt having positive magnetostriction is wound round to form a core body, heat treatment is performed to be impregnated with resin removable by dissolution, and after the core body is cut, the impregnated resin is dissolved to be removed. CONSTITUTION:An amorphously magnetic thin belt is wound round to form a core body 1, and after then, heat treatment is performed, and moreover after heat treatment is finished, plastic resin of a low melting point or solvent-soluble resin is percolated between the layers of the amorphous magnetic thin belt of the core body 1. Then the core body 1 is cut to obtain cut cores 1a, 1a. Then polishing of the cut faces is performed, and after polishing is finished, the impregnated resin is dissolved to be removed. Moreover after removal of the resin, fixation according to an outer shell mold or a casing is performed. Accordingly work at cutting time can be facilitated, and moreover, deterioration of the magnetic characteristic according to processing can be checked.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a method for manufacturing an amorphous core.

[Background technology]

The magnetostriction of amorphous magnetic ribbons created by the ultra-quenching method of iron-based or iron-di-sokel-based materials is large as shown in the table below.

The following steps are required to create a so-called moth core using such an amorphous magnetic ribbon.

■ Winding of amorphous magnetic ribbon ■ Heat treatment of amorphous magnetic ribbon ■ Resin impregnation, cutting of 037 body and polishing of 017 body Especially withstanding the stress applied to the core body during the processing of ■■ of the above steps Therefore, after the heat treatment (1) is completed, a process of resin impregnation or seven-coating is required.

The amorphous magnetic ribbon is heat-treated and becomes brittle.
If you cut it with a GC blade or a tire seven-point blade, you will not be able to get a uniform cut surface, so we vacuum-impregnate the resin between the layers and apply O-insulation treatment to each amorphous magnetic thin strip. I'm going to do a belt fixation.

However, there is a problem in that stress is applied to the amorphous magnetic f\1 band due to curing shrinkage of the resin and the difference between the resin's thermal expansion coefficient after curing and the amorphous magnetic ribbon's O thermal expansion coefficient.

The stiffness stress will be explained in detail next.

When a tree dialect of length t contracts by Δt, its contraction εsI
/'iIIC is made as follows.

εS: εR+εT−Δt7t・・・・・・・・・
・・・・・・・・・■ε Reaction contraction ε1 Heat shrinkable resin'D linear expansion coefficient is α□, temperature difference Δ1 is expressed as ε8 order.

εs −t R+“H・ΔT ・・・・・・
・・・・・・・・・■The expansion coefficient of amorphous magnetic thin film is dw
Assuming that the shrinkage stress σ8 shows an ideal behavior mJ according to Hooke's law, and f' is the resin O ratio, the following equation is obtained.

α=E(ε −dw ・ΔT)・・・・・・・・・
・・・・・・・・・■S S Next, when the cylindrical cast body with circumference t contracts by Δt,
Considering the case where the contraction is obstructed by a Troutanoid core wound with an amorphous magnetic ribbon in the circumference, Tim
O Shrinkage Stress (where μ indicates the bore-association ratio) By substituting the equation 0 into the equation 0, the following is obtained.

Here, using the O ebo resin shown in the table below, □'' ■ (line) Shrinkage rate 1%, hardening at 120℃, bore ratio μ = 0
．． Assuming 5, the average amount of resin is 0 for each portion of the amorphous magnetic 7 #7 firefly and impregnated resin that constitute the troital]a.
．． Assuming that it will withstand adhesion to a thickness of 2 mn (actually, it will adhere to both sides, but the stress will be 1/2, so consider only one side), d
6=20 da=20.4. Also used as amorphous material, dw = OD, which is close to Ishibar material 7) IVletglass 2605S-3 manufactured by Allied Kesankar Co., Ltd.
Assuming that CB product name) is used, substituting these O assumption 2) values into the equation 0 yields the yield stress σa, and for example, if the number of Troutalpha layers is 50, then 7
A stress of 6.5 Lg/Crot will be applied. It is known that when such a large stress is applied to a magnetic material, the peak characteristics deteriorate significantly. As shown in the table below, the present invention was made in view of the above-mentioned problems, and the purpose of the present invention is to improve To provide a method for manufacturing an amorphous core that prevents deterioration of magnetic properties. Check out the core 114ctl+■
After the heat treatment, a low melting point plastic resin or a solvent-soluble resin is impregnated between the layers of the amorphous magnetic ribbon 7) of the core body il+, and the core body (1) is cut to form a cut core. (la) Obtain (la)■. Next, the cut surface was polished, and after finishing this O-grinding process, the impregnated resin mentioned above was removed, and after the M resin was removed, fixation was carried out using an outer cage (L-J cage). This casing may be done before or simultaneously with the removal of the dipping resin.

In other words, the present invention is characterized by the removal of resin O in (2), in which the core body ill, which has lost its elasticity and has become brittle due to heat treatment (2), is made rigid to withstand cutting and ψf friction by impregnating it with wax and wax. After cutting, polishing, and polishing one sheet, the immersion resin υ is removed by heating (vacuum can also be used) or solvent extraction. By removing the impregnated resin, the compressive stress and core of the amorphous magnetic M band are removed, and the cut core (la
)7) It may be possible to recover the magnetic properties.

Example 1 100min, convex Oμml! j! , ■, Amorphous product made of Metglas 2605 S-3 (trade name) manufactured by Allied Chemical Co., Ltd.] A thin ribbon is wound with 160 twists to form a core body il+, and this core body il+ is heated at 400°C. Heat treatment was performed for 60 minutes in a N gas atmosphere, and the heat softening temperature after this heat treatment was 90°C'7)? The core body il+ was heated and melted at 150°C.
"7) Impregnated between the layers. And impregnated with 200
After confirming that the wax had almost penetrated between the layers by applying a tan HgD vacuum for 20 minutes, cooling, cutting, and ωF polishing were performed. Next, the cut core (la) i obtained by cutting
Stored in a phenolic resin case, each case contains 20
0rtanHg 7) @ Re-encircled at 140℃D under pressure
Heat at a high temperature for 10 minutes to extract the wax between layers,
The cut core (1a) was fixed inside the case. The case tightly fixes the cut core (1a) and has a plurality of small holes (7) for extracting wax.

In this example, the following magnetic properties were obtained.

Instead of the microcrystalline wax in Example 1, polystyrene prepared by adding a peroxide catalyst per J was used to impregnate under reduced pressure between the layers of the same core body +I+ as in Example 1, and then cut. However, as in Example 1, the casing and polystyrene were removed simultaneously. Polystyrene removal involves extracting and removing polystyrene by impregnating it with benzene. However, the same results as in Example 1 were obtained in this example as well.

In the above embodiment, microcrystalline wax and resin such as polystyrene D are used, but it is also possible to use a +1 low melting point plastic resin or a solvent-soluble resin.

[Invention effect]

In the present invention, as described above, resin is impregnated between the layers of the core body after heat treatment, so that the core body 7) can be made into a single body before cutting. Therefore, the work at the time of cutting can be facilitated, and it can be easily cut. Is it impregnated with resin after cutting? Melting and removing means curing shrinkage of the resin impregnated between layers, 11! I! The large stress applied to the amorphous magnetic ribbon due to the difference in coefficient of thermal expansion between the resin and the amorphous magnetic ribbon after oxidation is eliminated, and deterioration of the magnetic properties of the amorphous core can be prevented. It has excellent effects.

[Brief explanation of the drawing]

The drawings are explanatory views of the process flow of the present invention, in which (1) is a core body and (la) is a cut core. Agent: Patent Attorney Ishi 1) Chief Seventh Procedural Amendment (spontaneous) May 28, 1980 To the Commissioner of the Japan Patent Office 1, Indication of the case: 1984 Patent Application No. 84381 '8.2, Name of the invention: Amorphous Core manufacturing method 3, relationship with the case of the person making the amendment Patent applicant Location 1048 Bold Kadoma, Kadoma City, Osaka Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4, Agent 5, Date of amendment order Voluntary action 8. Contents of the amendment amended as shown in the attached sheet Application number: Japanese Patent Application No. 1984-84381 1. The table on page 6 of the specification of the present application is corrected as follows. Correct as shown below. "Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office 1. Indication of the case 1981 Special D1 Application No. 84321 2 Title of the invention Method for manufacturing an amorphous core 3 Party making the amendment 1' (Relationship with Patent applicant 1 -L Location: 104 Kadoma, Kadoma City, Osaka Prefecture
Address 8 Name (583) Matsushita Electric Works Co., Ltd. Representative name Iku Kobayashi 4, representative J! 11 Postal Code 530 (1) Detailed Disciple Page 10 vS line 11 “Drawing”
"Fig." is corrected. (2) Correct the drawing as shown in attached Figure 1.

Claims (1)

[Claims] A core body is formed by winding an amorphous magnetic ribbon having +11 positive magnetostriction, heat treatment is performed after this formation, and after this heat treatment, a resin that can be melted and removed with heat or a solvent is impregnated between the layers of the core body. A method for manufacturing an amorphous core, comprising: cutting the core body to form a cut core after impregnating the core with the resin; and melting and removing the impregnated resin after forming the cut core.